- Co-citation
Co-citation means that two documents, pages or brands are cited together by a third source, without citing each other.
- Domain authority
Domain authority is a score that estimates how strong a website's link profile is.
- Page authority
Page Authority (PA) is a metric from the SEO tool vendor Moz.
- PageRank
PageRank is a method for scoring the importance of a web page from the links that point to it.
- Trust flow
Trust Flow and Citation Flow are two metrics from the SEO tool vendor Majestic.
- TrustRankHistorical
TrustRank is a link-based method to separate reputable pages from web spam.