We have mentioned trust flow and citation flow a few times in this article. However, both are important terms when it comes to assessing the authority of a web page. A citation flow measures how many sites link to it. Whereas a trust flow also measures link quality. I.e., instead of just looking at the number of sites linking to the site, it measures the authority of the links. So, for example, a website with backlinks from a spammy blog will have a much lower trust flow score than one referenced by a reputable review website.