Thank you for this great platform BHW for sharing wonderful knowledge. I am doing SEO for my web portal since 2011. It is currently ranking in middle of first page for medium competitive keywords with searches of around 20k. And also for couple of terms in second pages. And LOTS of long tails. I started wondering what are the factors/metrics to consider a website as authority website (Which should be measurable by algorithms). It is a question I couldn't answer myself clearly. So your views will be greatly appreciated. I will update the below section after the discussion in this thread. Keep going thanks Factors To Consider A Website As Authority 1) Domain Age (Need to check whether site is alive or not since the registration) 2) Indexed Pages (Quality of pages to be considered) 3) Branding (Using Citations to some extend) 4) 5) 6) Thank you for your suggestions. Please post your suggestions. I will update the list based yours feedback.