What is a backlink?
A backlink is an inbound link from one website to another. When Site A links to Site B, that is a backlink for Site B. Google uses backlinks as a signal of authority and relevance: a page linked to by many trusted sites is more likely to rank well.
How backlinks affect rankings
Not all backlinks are equal. Links from high-authority, topically relevant domains carry more weight. Links from low-quality or spammy sites carry less or can be actively harmful. The quality, relevance, and anchor text of backlinks collectively determine their ranking impact.
Building backlinks (link building) is one of the highest-ROI but most time-intensive aspects of SEO. Tactics include digital PR, guest posting, linkable asset creation, and competitor backlink prospecting.
Example
Example
A link from Search Engine Journal to your SEO case study carries far more weight than 100 links from unrelated directory sites.
Frequently asked questions
Are all backlinks equally valuable?
No. A single link from a high-authority, topically relevant page outweighs hundreds from low-quality directories. Quality, relevance, and placement determine impact; raw counts mislead.
What are the main ways to build backlinks?
Digital PR, linkable assets (original data, tools, research), guest contributions, and competitor backlink prospecting. The common thread: create something worth citing, then put it in front of people who cite things.