In SEO, a linking root domain refers to a unique domain that links to a website, regardless of how many links are coming from that domain. In other words, multiple backlinks from a single website are counted as one linking root domain. This metric is important as it provides a clearer picture of a website’s backlink profile by eliminating the potential skewing effect that could be caused if a site were to have many links but all from a few domains.
Having a diverse range of linking root domains is generally seen as a strong signal of a website’s authority and trustworthiness. Search engines, such as Google, consider the number and quality of linking root domains as a significant factor in determining a website’s rank in the search results. It is akin to a vote of confidence from other websites on the internet, indicating that the content is valuable and reputable.
However, not all linking root domains are equal in the eyes of search engines. The quality, relevance, and authority of the domains linking to a site play a critical role.
Links from authoritative, well-respected, and relevant sites are more valuable than links from low-quality, spammy, or unrelated sites. SEO professionals, therefore, strive to gain high-quality backlinks from a variety of reputable and relevant domains rather than focusing on the sheer quantity of backlinks.