What is a Backlink? Complete Beginner’s Guide (With Examples)
A backlink is simply a link from one website to another — and it is one of the most important factors in how Google decides which pages rank on page one.
This guide covers everything beginners need to know: what backlinks are, why they matter, what types exist, and how to start getting them.
What Is a Backlink?
A backlink is a hyperlink on someone else’s website that points to your website. When Site A publishes an article and includes a clickable link that takes readers to Site B, Site B has received a backlink from Site A.
The word “back” in backlink refers to the direction of the link — it points back to your site from an external source. This distinguishes backlinks from two other link types:
- Internal links — links between pages on the same website (not backlinks)
- Outbound links — links your site sends out to other websites (not backlinks to you)
Simple example: A popular SEO blog writes an article about Domain Authority and includes a sentence: “You can check any website’s authority score using a free authority checker.” If that phrase links to another site, that destination site has received a backlink.
Other names for backlinks: Inbound links, incoming links, external links (from the destination’s perspective), one-way links. All these terms describe the same thing — a link arriving at your site from another domain.
Why Do Backlinks Matter for SEO?
Backlinks are one of Google’s most important ranking signals — and have been since Google’s founding algorithm, PageRank, was built around them in 1998.
The logic is straightforward: When a credible website links to your content, it is essentially vouching for it. Google treats this like a vote of confidence. The more quality votes your page collects, the more trustworthy Google considers it — and the better it ranks.
As one r/SEO user put it: “A few solid links from sites in the same niche did more than dozens of random guest posts. Backlinks act more like a trust signal than a ranking cheat code.”
This is why backlinks directly affect two things you can measure:
Domain Authority (DA) — Moz’s score predicting how well your entire site ranks. More high-quality backlinks = higher DA.
Page Authority (PA) — the ranking strength of individual pages. A page with many quality backlinks ranks better for its target keywords.
Are Backlinks Still Important in 2026?
Yes — and this is one of the most common questions on r/SEO threads.
Despite constant changes to Google’s algorithm, backlinks remain a core ranking factor. Google’s own documentation and search advocates like John Mueller consistently confirm that links are among the strongest signals Google uses.
The shift that has happened: quality now matters far more than quantity.
One editorial backlink from a DA 70 publication can outweigh one hundred links from low-quality sites. Google’s systems have become sophisticated enough to distinguish genuinely earned editorial links from manufactured ones.
Backlinks also now influence AI Overviews and LLM answers. When AI systems like Google’s AI Overview or ChatGPT generate answers, they draw from content that is frequently cited and linked to by authoritative sources. A strong backlink profile makes your content more likely to be used as a source in AI-generated responses — which is what GEO (Generative Engine Optimization) is built around.
How Backlinks Work — The Technical Side
When a page receives a backlink, something called link equity (also called “link juice”) flows from the linking page to the linked page. This equity represents a portion of the linking page’s own authority.
How the flow works:
- A page with many high-authority backlinks has a large amount of link equity
- When that page links to your page, a portion of its equity transfers to you
- Your page’s authority grows from the accumulated equity it receives
- This equity then passes further to any pages your page links to internally
The strength of equity transferred depends on:
- The Domain Authority of the linking site
- The Page Authority of the specific linking page
- How many other outbound links that page contains (more links = smaller individual share)
- Whether the link is dofollow or nofollow
This flow of equity is what makes a backlink from a DA 80 site so valuable — you are receiving a share of that site’s accumulated authority.
Types of Backlinks — Dofollow vs Nofollow
Not all backlinks pass the same value. The most important distinction is between dofollow and nofollow links.
Dofollow Backlinks
A dofollow backlink passes full link equity from the linking page to your page. This is the default — if a website publishes a normal hyperlink without any special tag, it is dofollow.
Dofollow links directly improve Domain Authority and Page Authority. They are the type most SEOs pursue through link building campaigns.
html
<a href="https://yoursite.com">anchor text here</a>Nofollow Backlinks
A nofollow backlink contains a rel="nofollow" attribute that instructs search engines not to pass link equity through the link.
html
<a href="https://yoursite.com" rel="nofollow">anchor text here</a>Google introduced nofollow in 2005 to combat comment spam. Most social media platforms, Wikipedia, and many news sites apply nofollow to outbound links by default.
Do nofollow links have value? More than most people realize. A Semrush study found that nofollow links performed almost identically to dofollow links in many cases. Google now treats nofollow as a “hint” rather than a hard rule — meaning it may still consider some nofollow links. More importantly, nofollow links drive real referral traffic, build brand awareness, and create a natural-looking backlink profile. A profile with only dofollow links looks artificial to Google.
Sponsored and UGC Links
Google introduced two additional link types in 2019:
- rel=”sponsored” — marks paid or advertising links
- rel=”ugc” — marks user-generated content links (comments, forum posts)
Both are treated similarly to nofollow.
What Makes a Backlink Valuable?
Not all backlinks contribute equally to your Domain Authority. These factors determine a backlink’s value:
1. Domain Authority of the linking site: A link from a DA 70 news publication is worth far more than a link from a DA 15 blog. Higher authority sites pass more link equity.
2. Topical relevance: A link from a website in your exact niche carries stronger topical signals than a link from an unrelated domain — even if both have similar DA scores.
3. Placement within the content: Links placed within the main body of an article (editorial links) are more valuable than links in footers, sidebars, or author bio sections.
4. Anchor text: The clickable text of the link tells Google what the linked page is about. Descriptive anchor text like “how to check domain authority” is more informative than “click here.”
5. Page Authority of the linking page: The specific page linking to you matters. A link from a PA 50 page passes more equity than a link from a PA 10 page on the same domain.
6. Referring domain diversity: Ten backlinks from ten different domains is stronger than ten backlinks from the same domain. Google values diversity — it signals that multiple independent sources consider your content worth referencing.
Types of Backlinks by Source
Editorial backlinks — naturally earned when journalists, bloggers, or researchers link to your content because it is genuinely useful. The most valuable type — no request or payment involved.
Guest post backlinks — earned by writing content for another website in exchange for an author link or contextual link within the piece.
Resource page backlinks — earned when your content is added to curated resource lists on other sites.
Broken link replacements — earned by finding broken links on other sites and offering your content as a replacement.
Forum and community backlinks — typically nofollow, earned from relevant community participation.
Social media backlinks — nofollow links from LinkedIn, Twitter, Facebook. Limited direct SEO value but contribute to brand signals and can drive traffic that leads to editorial links.
Directory backlinks — listings in legitimate, curated industry directories. Low but real value when the directory is reputable.
What Does NOT Count as a Backlink
Internal links — a link from one page of your site to another on the same domain. Important for distributing authority internally but not counted as backlinks.
Unlinked brand mentions — when someone writes your brand name without a hyperlink. Not a backlink, though Google’s entity recognition may still associate your brand with the topic.
Self-placed comment links — nofollow on most platforms, carry minimal value and look spammy if overdone.
Do Social Media Links Count as Backlinks?
This is a frequently asked question on Reddit’s r/SEO. The answer: technically yes, but with important nuance.
A link from Facebook, LinkedIn, or Twitter pointing to your site is a backlink — but virtually all social media platforms apply nofollow tags, meaning they do not pass direct link equity.
Why social media links still matter:
- They drive real referral traffic
- They put your content in front of journalists and bloggers who may create editorial links
- AI-powered answer engines read social platforms and use social signals when forming responses
- A natural backlink profile includes some social links — zero social mentions looks unusual
Social media backlinks are not a substitute for editorial link building — but they are a useful part of a complete strategy.
Are Backlinks Everything in SEO?
The honest answer: no — but they are essential.
Google’s ranking algorithm uses hundreds of signals. Content quality, search intent alignment, technical SEO (site speed, mobile usability), E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness), and user engagement signals all matter.
But in competitive niches, backlinks are often the deciding factor.
Two pages with equally good content competing for the same keyword — the one with stronger backlinks almost always wins. Content quality gets you in the game. Backlinks determine where you finish.
The most effective SEO strategy in 2026 combines both: publish content that genuinely earns links, then actively build those links through proven methods.
How Many Backlinks Do You Need to Rank?
There is no fixed number — it depends entirely on your competition.
How to estimate what you need: Search Google for your target keyword. Check the top-ranking pages in Moz Link Explorer or any free authority checker. Note their referring domain counts. That number is your realistic target.
- Low-competition niche: 10 to 30 referring domains may be enough
- Medium-competition: 30 to 100 referring domains
- High-competition: 100+ diverse referring domains from authoritative sites
Quality always beats quantity. Three links from DA 60+ publications regularly outperform fifty links from DA 15 blogs.
How to Start Getting Backlinks
For beginners, these are the most accessible starting methods:
Create link-worthy content: Comprehensive guides, original data, free tools, and expert roundups naturally attract links. Content that answers questions better than anything else in your niche is the foundation.
Guest posting: Write valuable articles for other sites in your niche. Search Google for your niche + "write for us" to find opportunities targeting DA 30+.
Broken link building: Find broken links on resource pages and offer your content as a replacement. High response rates — you are solving a problem for the site owner.
HARO (Help A Reporter Out): Respond to journalist queries at helpareporter.com. When selected, you earn an editorial backlink from the publication — often DA 60 to 90+. Completely free.
Resource page outreach: Find curated resource lists in your niche and suggest your most helpful content for inclusion.
How to Check Your Backlinks
Monitoring your backlink profile is essential for tracking growth and catching toxic links early.
Free tools:
- Google Search Console — free, shows all linking domains as Google sees them
- Moz Link Explorer — 10 free searches per month, shows DA, PA, and Spam Score of linking domains
- Ahrefs free preview — limited view of top referring domains
- Ubersuggest — 3 free daily searches showing referring domains and domain scores
Check your backlink profile monthly. Track referring domain count, Domain Authority growth, and Spam Score. A rising Spam Score signals toxic links accumulating — address them with a disavow file before they cause damage.
Frequently Asked Questions (FAQ)
What is a backlink in simple terms?
A backlink is a link from another website that points to your website. When Site A links to Site B, Site B has received a backlink. Google uses backlinks as trust signals — the more quality backlinks a page has, the more trustworthy and authoritative Google considers it, which directly improves its rankings.
Can someone explain backlinks easily?
Think of backlinks like recommendations. If ten trusted people in your industry recommend your work to others, you become more credible. Backlinks work the same way — when credible websites link to your content, Google sees it as a recommendation and ranks your page higher. The more trusted the recommending site, the more valuable the recommendation.
How do backlinks actually work technically?
Every page on the internet has a certain amount of ranking power called link equity. When a page links to your page, it shares a portion of its link equity with you. This equity accumulates on your page and makes it rank better. Pages that receive links from many high-authority sites accumulate the most equity — and rank the highest.
Are backlinks still important in 2026?
Yes. Backlinks remain one of Google’s most important ranking signals in 2026. They also now influence AI Overviews and LLM-generated answers — content that is frequently cited and linked to by authoritative sources is more likely to be used as a source in AI responses. Quality matters far more than quantity now, but backlinks are not going away.
What actually makes a backlink good or bad?
A good backlink comes from: a site with high Domain Authority (DA 30+), is topically relevant to your niche, is placed inside the main body of an article (not the footer or sidebar), uses descriptive anchor text, and comes from a domain that has not already linked to you. A bad backlink comes from spam sites, link farms, PBN networks, or irrelevant foreign sites with a high Spam Score.
Do social media links (Reddit, LinkedIn, Twitter) count as backlinks?
Technically yes, but most social media links are nofollow — they do not directly pass link equity. They still matter for driving referral traffic, building brand signals, and getting your content in front of journalists who may create editorial backlinks. AI answer engines also read social platforms, so social visibility contributes to your content appearing in AI-generated responses.
Is a link I put in a comment or forum a backlink?
Yes, but these are almost always nofollow and carry minimal link equity. More importantly, leaving links in comments solely to build backlinks looks spammy and can hurt your reputation. The better approach is participating genuinely in communities — if your content is helpful, people share and link to it editorially.
How many backlinks do I need to rank on Google?
There is no universal number. Check the top-ranking pages for your target keyword and note how many referring domains they have — that is your practical target. In low-competition niches, 10 to 30 quality referring domains may be enough. Competitive niches often require 100+ diverse referring domains from authoritative sites.
Are backlinks really 99% of SEO?
No, but they are essential in competitive niches. Content quality, technical SEO, search intent alignment, and user experience all matter. However, when two pages are equally good on all other factors, backlinks are usually the deciding factor. Most r/SEO veterans describe backlinks as necessary but not sufficient — you need good content first, then backlinks to push it past competing pages.
What is the difference between a backlink and an internal link?
A backlink comes from a completely different website pointing to yours. An internal link connects two pages within the same website. Both are important for SEO — backlinks build your domain’s overall authority, while internal links distribute that authority across your individual pages. Only backlinks from external domains count toward your Domain Authority score.
Can bad backlinks hurt my website?
Yes. Links from spammy sites, PBN networks, or link farms can increase your Spam Score and trigger Google’s algorithmic or manual penalties. Negative SEO attacks — competitors pointing spam links at your site — are also real. Regular monthly backlink audits and disavowing confirmed toxic links keep your profile clean and your rankings safe.
