These 3rd party metrics are used by some people to determine a website's worth or how competitive a website is in the search engine results pages, also known as the SERPs. However, as macdonjo3 demonstrated in his thread, these metrics can be easily manipulated.http://searchengineland.com/majestic-seo-announces-new-link-metrics-trust-flow-citation-flow-121230
- Citation Flow is a number of predicting how influential a URL might be based on how many sites link to it.
- Trust Flow is a number predicting how trustworthy a page is based on how trustworthy sites tend to link to trustworthy neighbors.