Co-Citation
How frequently two websites (or webpages) are mentioned together by a third-party website, even if those first two items don’t link to (or reference) each other. This is a way search engines can establish subject similarity.
How frequently two websites (or webpages) are mentioned together by a third-party website, even if those first two items don’t link to (or reference) each other. This is a way search engines can establish subject similarity.