If you wanted to feature on websites, say maybe to build backlinks, how would you know the most authoritative or reputable ones to target? After all, there are over 1.8 billion websites on the Internet. It turns out there is a rating system! Usually known as "MOZ Domain Authority" All websites are not rated equal. Some pack more "respect and reputation" than others. Some are still trying to gain traction. Some have been online for years, steadily building their presence. Some only got registered this year. This disparity that exists among websites gives rise to the need for a rating system, and it's called (DA).