Definition
Co-citation is an SEO concept describing the situation where two entities (websites, pages, or brands) are frequently mentioned together on third-party pages, even without a direct link between them. If many web pages mention both your site and a competitor's site in a similar context, Google establishes a thematic association between the two. Co-citation strengthens topical relevance: if your site is regularly co-cited with authoritative sites in your field, it can reinforce your own topical authority. This concept is related to co-occurrence (words appearing together) and differs from co-linking (pages receiving links from the same sources). Co-citation is a relevance signal that works without requiring a hyperlink, making it particularly interesting as unlinked mentions grow in importance.
Key Points
- Two sites frequently mentioned together create a thematic association
- Works without hyperlinks, through textual mentions
- Strengthens topical relevance and site authority
Practical Examples
Thematic association
If many articles about link building mention LemmiLink and Semrush in the same context, Google understands that LemmiLink is thematically related to the SEO and link building space.
Co-citation strategy
Seek to be mentioned alongside industry leaders: comparative articles, tool lists, resource guides. Even without a link, these co-citations strengthen your topical relevance.
Frequently Asked Questions
No, co-citation is a complementary signal to backlinks, not a replacement. Backlinks remain a major ranking factor. Co-citation adds a layer of topical relevance that reinforces the impact of existing links.
Get mentioned in comparative articles, resource lists, and industry guides. Digital PR, guest posting, and creating reference content encourage co-citations with established players in your space.
Go Further with LemmiLink
Discover how LemmiLink can help you put these SEO concepts into practice.
Last updated: 2026-02-07