Domain age refers to the length of time that a website has been registered and active. Domain age conveys trust to website visitors and to the search engines.
Two factors are considered in the age of a domain name. First, is the length of time that a domain has been registered. Second, is the age of the website in regards to how long that it has been active, or how long that it has had crawlable content on the web. The search engines factor domain age from the time that the website is first crawled by the search engines and when the first inbound link to the website is noticed.
Domain age is important for SEO purposes because the age of a website is a search engine ranking factor. The search engines want to provide users with the best possible results. As a website ages over time, it becomes more trusted in the eyes of the search engines as long as it has quality content and a robust portfolio of relevant inbound links that have been established over time. An older domain age conveys longevity, whereas there is more uncertainty regarding what a new website can or will offer to visitors.
While domain age does convey trust to the search engines, it is only one of many ranking factors and owners of new domains shouldn’t worry that their website will never be able to compete. It may take more time, but the focus is always on quality content and gaining relevant inbound links.