Google Authority

Google ‘authority’ is an indicator that represents your website’s importance to Google
The more authority the greater opportunity the site would have to rank higher in searches

Historically this was largely defined by the number and ‘value’ of backlinks to your site, although Google did insist it considered ‘over 200 factors….’ when calculating a website’s ranking.

More recently Google Authority has evolved to include a range of additional factors such as page load performance, absence of errors, use of Social Media etc etc