Domain Authority for SEO

What is domain authority?

Domain Authority is an SEO score that predicts how well a website will rank on search engines. A website’s domain authority is based on:

  • inbound links (also called back links),
  • number of total links,
  • age of domain,
  • domain trust, (real words)
  • domain length, (shorter the better)
  • keyword(s),
  • brand name,
  • number of keywords (one is best), and
  • about 200 other factors.

What are domains?

Domains are also called domain names. Domains are the unique portions of each website’s address.

Domains are the unique, human-readable Internet addresses of websites. Domains usually comprise two parts:

  1. A top-level domain (sometimes called an extension or domain suffix), and
  2. Domain keyword(s) (or IP address).

So a domain keyword is the second level of a domain’s hierarchy (after the top-level domain).

An optional subdomain, such as or, is rarely used anymore. Subdomains are no longer desirable because they create confusion and increase the chance of error in typing in a URL.

Domains are purchased from registrars or domain owners. The following are example domains:

What is a URL?

A URL is a website’s complete address, including the protocol.   The “https://” is part of a page’s URL but not its domain name and is known as the “protocol.”

What is a ccTLD?

ccTLD stands for Country Code Top Level Domain. This is the last part of a domain name that contain a country code: .ca or .us instead of .com or .org. (Trivia: the ccTLD system was created in 1984, when the early Internet was still called ARPA-Internet.)