Technical SEO
Domain Age
Domain age refers to the length of time since a domain name was first registered with a domain registrar. While Google's John Mueller has stated that domain age per se is not a direct ranking factor, older domains often have accumulated backlinks, trust signals, and historical authority that contribute to stronger search performance.
Domain age is verified using WHOIS lookup services such as DomainTools or ICANN WHOIS. Ahrefs' Site Explorer shows a domain's first seen date (when Ahrefs first crawled it), while Wayback Machine (archive.org) reveals when a site's content first appeared online.
Authority Links
Related Terms
Technical SEO
Domain
Addresses that allow Internet users to access websites are called domains.
Measurement
Domain Authority
A third-party proprietary score (Moz DA, Ahrefs DR, SEMrush AS) on a 1–100 scale that estimates a domain's competitive ranking strength based on link profile quantity and quality — not a metric Google uses directly.
Other
Whois
Refers to the service that provides access to a lot of information about domain names.
Technical SEO
Subdomain
Refers to a domain that is part of another domain.