A backlink is a link on someone else’s website that points to yours. Search engines treat it as a vote of confidence: if a trusted site links to your page, that page becomes more likely to rank. Backlinks are one of the strongest signals in Google’s ranking system.
That’s the short answer. The longer answer is where beginners get lost, because “get backlinks” sounds simple and turns out to be the hardest part of SEO to do well. This guide covers it in the order you need it: what a link is, why Google cares, what separates a link worth having from one that does nothing, how to judge a link before you chase it, how to earn links without a budget, what will get you penalized, and how to know whether any of it worked.
Table of Contents
- 1 What a backlink actually is
- 2 Why Google weights links so heavily
- 3 What makes one link valuable and another worthless
- 4 How to evaluate a link before you chase it
- 5 Anchor text, in real numbers
- 6 How to actually earn backlinks
- 7 How backlinks work in AI search
- 8 What to avoid
- 9 How to measure whether it’s working
- 10 Where to start if you have nothing
- 11 Frequently asked questions
What a backlink actually is
When a page on example.com includes a clickable link to yoursite.com/services, that’s a backlink for your services page. Same thing, different names: inbound link, incoming link, external link. Old-school SEOs still say “link juice” for the value flowing across it; the industry mostly calls that link equity now.
Every backlink has parts worth naming, because you’ll be evaluating them constantly:
The linking page — the specific URL the link sits on. Not the site’s homepage, the actual page.
The linking domain — the website it belongs to. Ten links from one blog count for far less than ten links from ten different blogs. This is why SEO tools report referring domains separately from total backlinks, and why referring domains is the number to watch.
The anchor text — the visible, clickable words. If a site links to your page using the words “technical SEO checklist,” you’ve told Google something about what that page covers.
The link attribute — a piece of HTML telling search engines how to treat the link. This one causes more beginner confusion than anything else, so let’s clear it up.
A standard link passes authority by default. A link with rel="nofollow" tells search engines the site isn’t vouching for the destination. Google introduced nofollow in 2005 to fight comment spam, and in 2019 announced it would treat nofollow as a hint rather than a strict directive, meaning it may still use those links for discovery and ranking. Google also added rel="sponsored" for paid and affiliate links and rel="ugc" for user-generated content.
The practical takeaway: don’t dismiss a nofollow link from a publication your customers actually read. It carries traffic, brand exposure, and increasingly, AI citation. Natural profiles contain a mix of both — a profile with 100% followed links looks manufactured, because real ones never are.
Why Google weights links so heavily
Google’s original insight, published by Larry Page and Sergey Brin at Stanford, was PageRank: treat a link as a citation, the way academic papers cite each other. A paper cited by 500 others is probably important, and a citation from a well-cited paper counts more than one from an obscure paper. Pages work the same way. That idea is decades old and still load-bearing — Google has said publicly that links remain one of its strongest signals, even as their weight shifted alongside content quality and user-behavior signals.
Links stay important because they’re expensive to fake at scale in a way that looks natural. Anyone can write a page claiming expertise. Getting fifty independent, respected sites to reference it requires either genuinely useful work or a lot of money, and Google has gotten good at spotting the money.
Modern link evaluation is not a simple count. Google looks at the relevance of the linking site to your topic, the trustworthiness of the domain, where on the page the link sits, the surrounding text, how many other links share that page, and whether your link growth looks organic over time. That last part matters more than beginners expect. A site that goes from 4 referring domains to 400 in six weeks, with no press coverage and no viral content, is telling Google a story. It’s rarely a good one.
What makes one link valuable and another worthless
Here’s the mental model I’d hand a beginner: a good backlink is one that would send you real customers even if search engines didn’t exist. Test any opportunity against that and most of the garbage falls away on its own.
Relevance is the first filter. A link from a mid-sized accounting blog to your bookkeeping software beats a link from a high-authority general news site with no topical connection. Google evaluates the topical context around a link. This is where semantic SEO and link building meet: if the linking page discusses the same entities and concepts your page covers, the link carries far more meaning than a raw authority score suggests.
Authority is the second filter. Google doesn’t publish an authority score. Third-party tools estimate one: Ahrefs has Domain Rating (DR), Moz has Domain Authority (DA), Semrush has Authority Score. These are proxies built on link graphs those companies crawled themselves, and they can be gamed. Treat DR 60 as “worth a closer look,” not as proof of anything.
Editorial placement is the third filter. A link inside the body of an article, placed by a writer because it was genuinely useful, is the gold standard. A link in a sidebar, footer, author bio, or a list of 40 outbound links at the bottom of a post is worth a fraction of that.
Traffic is the quietest and most reliable filter. A page with 500 monthly organic visits passes more value and sends more actual humans than a DR 70 page that ranks for nothing. Plenty of high-DR sites have thousands of pages nobody ever sees. Check estimated traffic to the specific page, not the domain.
Essentially worthless: blog comment links, unmoderated directory submissions, forum signatures, most free web 2.0 properties, spun-content guest posts on private blog networks, and any site that will publish literally anything for $30.
How to evaluate a link before you chase it
You need a repeatable checklist, because you’ll do this hundreds of times.
1. Look at the site with your own eyes. About page, named authors, real contact info? Would you be comfortable if a customer clicked from that page to yours?
2. Check whether its pages actually rank. Drop the domain into Ahrefs Site Explorer or Semrush Domain Overview. DR 55 with 200 monthly organic visits means that score was bought.
3. Check the outbound link pattern. If every recent post contains five links to unrelated commercial sites — a casino, a CBD store, an SEO agency, a crypto exchange — it’s a link farm dressed up as a blog.
4. Read two paragraphs. Written by someone who knows the subject, or 900 words of filler wrapped around an anchor?
5. Check topical fit. Does the site cover your subject regularly, or is your topic a one-off?
Free tools worth knowing: Google Search Console (your own link report, straight from Google), Ahrefs Webmaster Tools (free backlink data for sites you own), Moz Link Explorer (limited free queries), and the Ahrefs and Moz browser extensions. Paid: Ahrefs, Semrush, Majestic (Trust Flow versus Citation Flow is a useful spam signal), and Screaming Frog for crawling your own link structure.
Anchor text, in real numbers
Anchor text is where beginners most often walk into a penalty, because the instinct is to use your target keyword every single time. Natural profiles never look like that. When real people link to you they mostly use your brand name, your URL, or a phrase from your title. Exact keyword matches are the rare case.
A distribution that reads as natural for most commercial sites looks roughly like this:
- Branded (your company name, “Shazz SEO”, “shazzseo.com/”): 40–60%
- Naked URLs (
https://shazzseo.com/page/): 10–20% - Generic (“click here,” “this guide,” “read more,” “source”): 10–20%
- Partial match / long-tail (“this guide to semantic SEO”): 10–20%
- Exact match (“semantic SEO services”): under 5%
Those are working ranges from practitioner experience, not a published Google rule, and the shape matters more than the exact percentages. If more than 10–15% of your links use exact-match commercial anchors, that’s the clearest fingerprint of paid link building there is, and it’s exactly what Google’s Penguin-era systems were built to catch.
One more rule: you don’t control most of your anchors, and that’s the point. If you’re carefully engineering every anchor across 200 links, you’ve already left the territory Google considers natural.
How to actually earn backlinks
This is the part where most guides get vague. Here’s what works, ordered roughly by how accessible it is when you’re starting with nothing.
Build something worth linking to first
Nobody links to a services page. They link to resources: original data, a genuinely better explanation of a hard topic, a free calculator, a template, a comparison nobody else has done honestly.
Before you send a single outreach email, ask whether a stranger landing on this page would have any reason to cite it. If not, outreach wastes everyone’s time. This is why topical authority and link building reinforce each other: a site with deep, useful coverage of one subject earns links passively, and every earned link makes the next page rank faster.
Digital PR and expert commentary
Journalists need sources on deadline. Platforms like Qwoted, Featured, Help a B2B Writer, and SourceBottle connect reporters with people who can comment. Answer a query in your area of expertise, and if you’re quoted you often get a link from a publication you could never buy your way into.
The hit rate is low — roughly one placement per ten to fifteen quality responses — but the links are excellent and each attempt is a 15-minute email rather than a 2,000-word article. What gets picked: answer the exact question asked, give a real number or example, stay under 200 words, send it fast. Vague thought-leadership language gets deleted.
Guest posting, done properly
Guest posting has a bad reputation because of how it was abused, but writing a real article for a publication your audience reads is still legitimate. The difference between the good version and the penalized version: are you pitching because you want to reach their readers, or because a spreadsheet said DR 50? If a site has a “write for us” page listing prices, you’re buying a link, and it should be marked rel="sponsored".
Unlinked brand mentions
Search "your brand" -site:yourdomain.com in Google. You’ll find people who mentioned you without linking. A short, polite email asking them to add the link converts far better than cold outreach, because they’ve already decided you’re worth mentioning. Automate the finding with Google Alerts (free) or Ahrefs Content Explorer (paid).
Broken link building
Find a dead page on a relevant site that still has links pointing at it, create a better replacement, and tell the sites linking to the dead resource. Find broken outbound links with the Check My Links Chrome extension or Ahrefs’ broken link report. It works because you’re solving a problem rather than asking for a favor.
Original data and research
The most reliable link magnet there is. Publish a number nobody else has — survey results, aggregated anonymized data from your own tools, a study of 500 pages in your niche — and journalists cite it for years. You don’t need a huge sample. A survey of 200 people in a specific industry, honestly reported with methodology disclosed, is citable. Overstating a small sample is not.
An outreach email that actually gets replies
Here’s the structure I’d use. Short, specific, no flattery padding.
Subject: Broken link on your [specific page title] Hi [first name], I was reading your piece on [exact article title] and the link to [dead resource] in the [section name] section is returning a 404 — looks like [original site] took it down. I recently published [your resource] which covers the same ground: [one specific, concrete thing it includes that the dead page had]. If it’s useful as a replacement, here it is: [URL]. If not, no problem at all — wanted to flag the broken link either way. [Your name] [Role, company]
It works because it proves you read the page, names an exact location, leads with something useful to them, makes the ask once, and gives them an easy out. Personalization means referencing something only a reader would know, not “I loved your blog!” Send from a real named address at your domain, follow up once after seven days in two sentences, then stop.
Expect a 5–10% response rate on well-targeted outreach and lower conversion to actual links. If you’re getting 1%, your target list is wrong or your resource isn’t good enough.
How backlinks work in AI search
This is the part almost nothing else on the first page of Google covers properly, and it’s where the game is currently changing.
ChatGPT, Perplexity, Google AI Overviews, and Claude answer questions by pulling from sources and, in most cases, citing them. Getting cited is becoming as commercially important as ranking — and links play a different role there than they do in classic search.
Google AI Overviews draw heavily from pages that already rank. Google generates these answers from its own index, and that index is still shaped by links. Links help you rank; ranking makes you eligible to be summarized. Invisible in organic search means invisible in AI Overviews.
Perplexity and ChatGPT search retrieve live, then synthesize. They run searches, pull a handful of sources, and build an answer. The sources they favor tend to be well-linked, frequently referenced, and clearly authoritative on the specific question. A link from a site a retrieval layer already trusts increases the chance your page enters the candidate set at all.
Mentions matter, not just links. This is the real shift. Language models are trained on and retrieve from text where your brand appears: Reddit threads, review sites, industry roundups, forum answers, comparison posts. Many of those mentions are nofollow or carry no link at all, and they still shape what an AI says about you. Traditional link-building math treats a nofollow Reddit mention as worthless. In AI search it can be one of the highest-value citations you get, because retrieval systems lean heavily on community and discussion sources.
Co-citation and entity association do the heavy lifting. When your brand appears repeatedly alongside a topic across many independent sources, models learn the association. That’s not link equity in the PageRank sense — it’s entity strength, and it’s why we build client link and mention profiles around topical clusters instead of chasing raw domain ratings.
The practical adjustment:
- Stop evaluating opportunities purely on DR. Ask whether the page will be read and referenced by people and machines in your subject area.
- Chase mentions on the platforms AI systems retrieve from heavily — Reddit, Quora, YouTube, industry communities, and review platforms like G2 or Clutch if you’re B2B.
- Structure your own pages so they’re easy to quote: direct answers near the top, headings that match real questions, specific numbers, a named author with credentials.
- Keep entity information consistent everywhere — same business name, description, and specialization. Inconsistent brand data weakens the association models build.
None of this replaces traditional link building; it sits on top of it. The sites winning AI citations overwhelmingly earned real links the hard way. They just also made sure they were quotable and present where the models look.
What to avoid
Buying links from anyone who advertises them publicly. Paid links that pass PageRank violate Google’s spam policies. Google’s link spam systems demote or ignore them, and manual actions still get issued.
Private blog networks. Networks of sites built purely to link out. They get deindexed in batches, and everyone who bought from them loses their links overnight.
Automated link tools. Anything promising 10,000 links for $50 is generating comment and profile spam.
Reciprocal link schemes at scale. Trading links with a partner is normal business. A 200-site link exchange group is a pattern.
Over-optimized anchors. Covered above, and still the most common self-inflicted penalty.
What a toxic profile looks like in numbers
Rough diagnostic signals when auditing a backlink profile:
- More than 20–30% of referring domains from a single country that isn’t a market you serve.
- More than 15% exact-match commercial anchor text.
- A large share of links from domains with high DR but near-zero organic traffic.
- Hundreds of referring domains but only a handful of referring IP ranges — “different” sites on one server usually means one network.
- A spike of 100+ new referring domains in a month with no press, launch, or viral event behind it.
- Majestic Trust Flow far below Citation Flow (say, TF 4 against CF 40): lots of links, little trust.
Any one of these can have an innocent explanation. Three together is a profile that needs cleaning.
On disavow: use it sparingly. Google says it ignores most spam links automatically, and a careless disavow file can remove links that were helping you. Reach for it when you have a manual action in Search Console, or inherited a site with a documented history of link buying.
How to measure whether it’s working
Total backlink count is nearly meaningless — one site can send you 4,000 sitewide footer links overnight and change nothing. Track these instead:
Referring domains over time. Unique linking sites. Steady growth is what you want. Free in Google Search Console under Links > Top linking sites.
Links to your money pages specifically. Most sites accumulate links to their blog and none to the pages that make money. Internal linking fixes that: authority flows through your site, so a well-linked guide can feed your service pages. That’s the structural reason this page exists as a hub.
Rankings for the target keywords of linked pages. Not overall traffic. Track the 10–20 keywords that page targets. If good links don’t move them in 8–12 weeks, the page has a different problem — usually intent mismatch or thin content.
Referral traffic from linking sites. GA4, Reports > Acquisition > Traffic acquisition, filtered to referral.
AI citation presence. Query ChatGPT, Perplexity, and Google AI Overviews monthly with the questions your customers actually ask, and record whether you appear.
On timing: a page already sitting on page two might move in two to four weeks off a strong link. A new page with no authority takes two to three months before the trend is readable.
On a new site the fastest path isn’t more links — it’s picking targets you can win with the links you already have. The Keyword Golden Ratio is a useful screening method, and this guide to finding low-competition keywords walks through the process end to end.
Where to start if you have nothing
An honest first 90 days:
- Verify Google Search Console and check what links you already have. Most people have more than they think.
- Claim the legitimate profiles: Google Business Profile, industry directories, associations you actually belong to, LinkedIn, Crunchbase. Not rocket fuel, but baseline entity signals AI systems read.
- Find your unlinked mentions and ask for the link.
- Build one genuinely excellent resource page on the topic you know better than anyone. One, not ten.
- Answer three journalist queries a week on one request platform.
- Fix your internal linking so authority reaches your commercial pages.
That beats buying 200 links from a marketplace by a distance. If you’d rather have it handled by people who do it daily, that’s what our link building services cover: relevance-screened placements built around topical clusters, not raw DR.
Frequently asked questions
What is a backlink in simple terms? A backlink is a link on another website that points to your website. Search engines treat it as a recommendation: pages with more links from trusted, relevant sites tend to rank higher.
How many backlinks do I need to rank? There’s no fixed number; it depends on how competitive the keyword is. Check how many referring domains point to the pages currently in the top 5 for your target term. That’s your benchmark. For low-competition long-tail terms, the answer is often zero to five.
Do nofollow backlinks help SEO? Yes. Google treats nofollow as a hint rather than a strict rule, so those links may still influence rankings. They also drive referral traffic, build brand recognition, and contribute to AI search citations. A natural profile always mixes followed and nofollow links.
How long do backlinks take to affect rankings? Typically two weeks to three months. Google has to crawl the linking page, process the link, and reassess yours. Pages already ranking on page two move fastest; brand-new pages take the longest.
Are paid backlinks safe? Links bought to pass ranking value violate Google’s spam policies. Google’s link spam systems detect and neutralize them, and manual penalties are still issued. Sponsored content is legitimate when marked rel="sponsored" — which also means it won’t pass ranking value.
What’s the difference between backlinks and internal links? A backlink comes from a different website. An internal link connects two pages on your own site. Backlinks bring authority in from outside; internal links distribute that authority to the pages you want to rank.
Do backlinks matter for ChatGPT and AI search? Yes, but indirectly. AI systems favor sources that are well-established and widely referenced, and links are a major reason a page reaches that status. Unlinked brand mentions on sites like Reddit, Quora, and review platforms also carry significant weight in AI citation, even when they pass no link value at all.
What is a good Domain Rating for a backlink? DR is a third-party estimate, not a Google metric, so use it for triage only. DR 30+ with real organic traffic and genuine topical relevance beats DR 70 with no traffic. Check traffic to the specific linking page, not just the domain.