A backlink is a link on one website that points to a page on another website. If a travel blog links to your hotel guide, that link is a backlink for you. Search engines treat backlinks as signals that other people found your page useful enough to reference, which is why they remain one of the most studied parts of SEO.
This guide explains what a backlink is in plain words, how search engines read it, the types you will come across, and how to judge whether a link is worth having. If you want a deeper look at the ranking side, read our guide on what backlinks mean for SEO.
What is a backlink in simple terms?
Think of the web as a huge network of pages connected by links. When page A links to page B, page B receives a backlink. Other names for the same thing are inbound link, incoming link and external link (from the receiving site’s point of view).
Every backlink has four parts you should know:
- Source page: the page where the link sits.
- Target page: the page on your site the link points to.
- Anchor text: the clickable words, such as “beginner hiking boots”.
- Link attribute: optional tags like nofollow, sponsored or ugc that tell search engines how to treat the link.
Why do backlinks matter for SEO?
Google was built on the idea that links work like citations. A page that earns links from many trusted, relevant pages is more likely to be useful than a page nobody references. Links also help search engines discover new pages, because crawlers follow links from one page to the next.
Backlinks matter for three practical reasons:
- Discovery: a link from an indexed page helps Google find your page faster.
- Relevance: the topic of the linking page and the anchor text tell Google what your page is about.
- Trust: links from established sites act as a vote of confidence.
Backlinks are not the only factor. Content quality, search intent, page experience and technical health all count. A strong link pointing at a weak page rarely ranks for long.
What are the main types of backlinks?
Dofollow and nofollow links
A normal link with no attribute is often called a dofollow link. It can pass ranking signals. A nofollow link carries rel="nofollow" and tells search engines not to treat it as an endorsement, although Google may still use it as a hint. Our guide to dofollow backlinks covers the difference in detail.
Sponsored and UGC links
Google asks site owners to mark paid links with rel="sponsored" and links in comments or forums with rel="ugc". You can read the rules in Google’s guide to qualifying outbound links.
Editorial and contextual links
Editorial links are placed by a writer because they add value to the reader. Contextual links sit inside the body of an article, surrounded by related text. These are usually the most valuable links because they are relevant and visible.
Guest post backlinks
Guest post backlinks come from articles you write for another site. When the site is relevant and has real readers, a guest post can bring both a useful link and referral traffic.
Low-value links
Links from directories built only for SEO, spun articles, link farms and comment spam rarely help and can attract a manual action. Avoid them.
How do search engines judge a backlink?
No search engine publishes an exact formula, but SEO tools and Google’s own documentation point to the same signals:
| Signal | What it means | Good sign |
|---|---|---|
| Relevance | Is the linking site about a related topic? | A fitness blog linking to a running shoe review |
| Authority | How trusted is the linking site? | Strong DR or DA plus real organic traffic |
| Traffic | Do people actually read the page? | Steady organic visits from your target country |
| Placement | Where does the link sit? | Inside the main article, not the footer |
| Anchor text | What words are linked? | Natural, descriptive and varied |
| Link attribute | Is it nofollow, sponsored or plain? | Honest labelling that matches the deal |
Moz’s overview of backlinks is another useful reference if you want to compare how tools measure these signals.
What does a good backlink look like in practice?
Imagine you sell project management software. A good backlink would be a mention in an article on a respected business blog about “how small teams plan projects”, linking to your guide on sprint planning. The blog has readers, the topic matches, the link helps the reader, and the anchor text describes your page.
A poor backlink would be your homepage listed on a site that links to thousands of unrelated businesses, with no readers and no context. It costs time and adds little.
How do you get backlinks?
There are two broad paths: earning links and building them.
- Earning: publish useful resources, original data, tools and guides that people want to cite.
- Building: reach out to relevant sites with guest posts, link insertions into existing articles, partnerships and digital PR.
Most growing websites combine both. Many teams also work with backlink providers to save time on research and outreach. If you go this route, choose SEO backlink services that show you the exact site, its traffic and its metrics before you pay. At Rank Booster Officials we list real sites so you can choose backlinks from relevant websites and approve each one first.
What mistakes should you avoid with backlinks?
- Buying hundreds of cheap links from unrelated sites.
- Using the same exact-match anchor text again and again.
- Chasing high DA scores on sites that have no real traffic.
- Ignoring link attributes on paid placements.
- Pointing every link at your homepage instead of the page that deserves to rank.
Key takeaways
- A backlink is a link from another website to yours.
- Search engines use backlinks for discovery, relevance and trust.
- Relevance, real traffic and natural placement matter more than raw numbers.
- Earn links with useful content and build them with honest outreach.
Frequently asked questions
What is a backlink in SEO?
A backlink is a link from another website to a page on your site. Search engines use backlinks as signals of relevance and trust when deciding which pages to rank.
Is a backlink the same as an inbound link?
Yes. Backlink, inbound link and incoming link all describe a link that points from another website to yours.
Are all backlinks good?
No. Links from relevant, trusted sites with real readers help. Links from spam sites, link farms or unrelated directories add little and can cause problems.
How many backlinks does a website need?
There is no fixed number. It depends on how competitive your keywords are and how strong the pages already ranking are. Quality and relevance matter more than count.
Can I get backlinks for free?
Yes. You can earn them by publishing useful content, getting featured in interviews, fixing broken links on other sites and building real relationships in your niche.
Sarah Payne is a versatile blogger, covering a wide range of topics from technological advancements to cultural insights. Her work illuminates the intersection of modern life with long-standing customs and the latest in efficiency and sustainability through technology.