Topical Trust Flow (TTF) is a Majestic metric that categorizes a domain's backlink profile by topic. Instead of just measuring how strong the links are (that's Trust Flow), TTF tells you what the domain is about based on who links to it. Categories include Business, Health, Shopping, and dozens more.
How Topical Trust Flow works
Majestic starts with a set of seed sites that are manually categorized into topics. Wikipedia falls under Reference. The Mayo Clinic falls under Health. Government sites fall under Society/Government. From there, the algorithm spreads topic categories through the link graph. If a domain gets most of its links from health-related sites, its TTF category will be Health.
Each domain gets a primary topic and a score for that topic. A domain with TTF Health/40 has a strong health-related backlink profile. One with TTF Shopping/12 has a weaker connection to shopping topics. The higher the score, the more concentrated and authoritative the topical signals.
TTF is particularly useful because it adds context that raw metrics miss. Two domains might both have Trust Flow 25 and 300 referring domains. But if one is categorized as Business and you're building a business site, that domain is far more relevant.
Why TTF matters for expired domains
Topical relevance is a big deal in SEO. Google's algorithms increasingly reward sites that demonstrate expertise in a specific topic. When you acquire an expired domain and build on it, matching the domain's existing topical signals to your content makes the inherited authority more effective.
For example, if you're launching a fitness blog, an expired domain with TTF Health is a better fit than one with TTF Computers, even if the Computers domain has higher raw metrics. The health-related backlinks will pass more relevant authority to your fitness content.
TTF on CatchDoms
CatchDoms shows a "Category" column displaying the TTF topic for each domain, sourced from SEObserver. You can filter domains by specific categories to find names that match your niche. This makes it easy to shortlist topically relevant expired domains instead of sorting through thousands of unrelated ones.