Conditional translation - “reference popularity. This term refers to an indicator depending on quantity and quality links, forming the external reference profile website.

The synonym for "link popularity" is "authority"(or" indicator of authority ").

Each search engine has its own indicators of reference popularity. So, y Google until recently was PageRank (no longer updated), but y Yandex - Weighted citation index.

VIZ not available for review to Internet users, but there is open access tis (thematic citation index), which is approximately the same indicator, but taking into account topics links and assigned not to individual pages, but to the entire site in general.

Between the values of the indicators of reference popularity and the positions taken in search engines there is a certain connection, although direct dependence is not observed.

Reference popularity is especially important when purchase links - It is the main pricing criterion.