What is an Inbound Link?

Inbound links are also called backlinks or incoming links: all 3 names describe the same thing, a link that points from someone else’s website to yours. They’re one of SEO’s longest-standing ranking factors. In March 2024, Google changed its documentation from calling links “an important factor” to calling them “a factor” in determining relevancy; that wording change doesn’t reveal how much weight links actually receive in the ranking systems.

Pages with more high-quality inbound links from relevant, reputable sites typically rank higher in search engine results pages (SERPs). Raw link count is not a useful goal, though: low-quality or manipulative links may add no ranking value and can violate Google’s spam policies.

How search engines use inbound links

Inbound links do 2 jobs. They’re discovery paths: crawlers find new pages by following links from pages already in Google’s index, so a page nothing links to may never be found at all. And they’re endorsements: each link signals that another site vouches for your content, and links from pages with strong link profiles of their own carry more weight. Google’s link best practices page puts it plainly: “Google uses links as a signal when determining the relevancy of pages and to find new pages to crawl.”

High-quality vs. low-quality inbound links

High-quality inbound links come from popular, relevant websites. Picture a bakery site: a link from a city food blog that reviews local bakeries carries real weight, while a listing in an unrelated free directory adds little or nothing. Three checks tell you most of what you need to know:

• Topical relevance: the linking page covers subject matter related to yours.
• The linking site’s standing: its own traffic, and the quality of the links pointing at it.
• Editorial placement: an author chose to cite you; the link wasn’t bought, traded, or dropped into a comment thread.

The anchor text (the clickable text of a link) should describe the linked page in plain language. You don’t control other sites’ anchor text, and engineering keyword-rich anchors at scale is listed in Google’s spam policies as link spam. Quality measures such as Domain Authority are covered in more depth in our backlink entry.

Inbound, outbound, and internal links

All 3 link types are named from where you’re standing:

• Inbound link: another website links to a page on your site.
• Outbound link (also called an external link): your site links out to a page on another website.
• Internal link: one page on your site links to another page on the same site.

The same hyperlink is 2 of these at once: an outbound link for the site publishing it and an inbound link for the site receiving it. Internal and outbound links are under your control; inbound links have to be earned, which is exactly why search engines treat them as a signal worth weighing.

Earning inbound links

The safest way to build inbound links is to earn them: publish content worth citing (original data, free tools, in-depth guides) and promote it through outreach and digital PR. Avoid directory submissions, social bookmarking, forum-signature links, and mass guest posting for links: Google’s spam policies list all 4 patterns as link spam. Earning links is a discipline of its own, so start with our link building entry for the common methods, then follow How To Get Backlinks: 12 Strategies That Work for a full walkthrough.

When inbound links hurt

Inbound links hurt when they form a manipulative pattern. Links from link farms, paid-link schemes, and spam networks fall under Google’s spam policies, and the policy is blunt: violating sites “may rank lower in results or not appear in results at all.” The risk sits with links you bought, traded, or built at scale, not with the random junk every site accumulates; Google says it typically ignores links from known spam sites. The disavow tool is a last resort for sites dealing with a manual action over unnatural links, not routine hygiene. If that’s not you, no cleanup is needed: keep earning links editorially, and never buy them.

How to check your inbound links

Google Search Console shows the inbound links Google has actually processed, for free. Open your property and go to the Links report: under External links, “Top linking sites” lists the domains that link to you most, and “Top linked pages” shows which of your pages earn the most links. “Top linking text” shows the anchor text other sites use, which is worth scanning for spammy patterns. Third-party tools such as Ahrefs, Semrush, and Moz crawl the web themselves and offer broader link indexes with quality scores layered on. Start with the Links report; if a linking site there looks unfamiliar or spammy, that’s your cue to investigate.