What Is a Backlink? SEO Explained in Plain English

October 14, 2026 · 5 min read · By the Outrix team

Key takeaways

  • A backlink is a link from another site to yours
  • Relevance and trust matter more than volume
  • The best links are earned, not bought

A backlink is a link from another website to yours. When a trusted site points to your page, it acts like a recommendation. Search engines use these recommendations as one of many signals when deciding which pages to rank.

A simple way to think about it

Imagine asking friends for a plumber. If three people you trust name the same one, you feel confident. If a stranger you have never met shouts a name at you, you do not. Search engines weigh links in a similar way: who is linking matters as much as how many.

What makes a backlink good

  • Relevance: the linking site covers a topic related to yours.
  • Trust: the site is well-run, original and respected in its field.
  • Context: the link appears naturally within useful content.
  • Real readers: people actually visit and read the page.

What makes a backlink bad

Links from sites created only to sell links, unrelated pages stuffed with hundreds of outbound links and comment spam offer little value. Some can even cause problems if search engines treat them as manipulation.

What anchor text means

Anchor text is the clickable wording of a link. Natural anchors, such as your brand name, a page title or a descriptive phrase, look healthy. Repeating an exact keyword in every link looks forced.

Dofollow and nofollow

Some links include a tag asking search engines not to pass credit. Those are still worth having when they send real visitors, and a normal profile contains a mix of both types.

How to earn backlinks

  • Publish content others want to reference, such as guides, data and tools
  • Contribute expert articles to relevant publications
  • Pitch your product or resource to bloggers in your niche
  • Join local organizations and community sites
  • Turn unlinked brand mentions into links

How many do you need?

There is no magic number. Look at the sites ranking above you and compare their link profiles with yours. Your goal is to close the gap with links that are relevant and trustworthy.

If you would like help building links the right way, explore our off-page SEO service or ask for an SEO audit of your current link profile.

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