Majestic has one of the largest public indexes of the entire web (42 billion +). The metrics given for the root and the www subdomain are different. At DomCop, we figure out if the original website was run at the root or at the www subdomain and accordingly give the correct metrics.
The various metrics are given below
Trust Flow: TF is a metric between 0 and 100 that measures the trustworthiness of the domain based on which websites link to the domain. If the links come from trustworthy sites then this number goes up deeming this domain as trustworthy.
Citation Flow: CF is a metric between 0 and 100 that predicts the value of the domain based on the back links to it. This could be used to compare the back link data between different domains. This would be similar to page rank and Moz domain authority.
Trust Flow/ Citation Flow ratio: The TF/CF ratio is one of the most important numbers to look at. Scammy domains tend to have a very low TF/CF ratio as it is very easy to manipulate CF, while not that easy to manipulate TF. Hence, a domain with a TF/CF that is less than 0.8 should simply be ignored.
Links: Total number of back links to the root or www subdomain.
Domains: Total number of referring domains with back links to the root or www subdomain.
IPs: Total number of unique IPs that have domains with back links to the root or www subdomain.
Subnets: Total number of unique subnets that have domains with back links to the root or www subdomain.
EDU Domains: Total number of EDU domains with back links to the root or www subdomain.
EDU Links: Total number of back links from EDU domains to the root or www subdomain.
GOV Domains: Total number of GOV domains with back links to the root or www subdomain.
GOV Links: Total number of back links from GOV domains to the root or www subdomain.
Topical Trust Flow: Majestic shows the categories for the back links to a domain with the trust flow passed. This is very useful in figuring out what industry the domain lies in based on its back links.