Trust Flow is a proprietary link metric developed by Majestic SEO that attempts to measure how trustworthy a website is based on the quality of sites linking to it. The score ranges from 0 to 100 and is calculated by tracing link paths back to a hand-curated seed set of highly trusted websites — the closer a site sits to those trusted sources in the link graph, the higher its Trust Flow. It is typically analysed alongside Citation Flow, Majestic’s separate measure of link volume, with a high Trust Flow relative to Citation Flow being a positive sign of link quality. Trust Flow is a third-party metric and has no direct relationship to Google’s internal ranking systems, but it is widely used in link-building and outreach campaigns as a quick proxy for evaluating the quality of prospective link sources.