An authority site is a very highqulaity website which provides deep knowledgeable stuff with the people in it's industry. It is a website that has content on it that is so good and makes the site so useful that people are actually glad they landed on it and happy to share.
Authority is a search engine ranking factors and is defined as the measure of power of any domain name or an online business authority. Many sites work on the process of online business authority which calculates the quality of effort linked with it. The basic three factors are Size, Popularity and Age.The popular renowned sites are given a huge domain authority, also those ones which contains many links..
An authority site is one that is seen as influential and trustworthy by search engines, and thus it tends to rank well. Authority sites tend to be well-established sites that have a lot of high-quality, relevant content as well as links from other authority sites.