New interesting statement today from Google's John Mueller, saying "awesomeness" is the #1 ranking factor.
https://www.seroundtable.com/google-awesomeness-24418.html Which makes me even more confidant traffic analytic into heavy consideration. How else can Google quickly see an up and coming "viral" webpage and get it quickly into its SERPS? They obviously are considering traffic to a page, as well as click-through traffic on sites/pages that they have analytics on.
When a site or a page goes "viral" it is because of an effect similar to what happens on a bird feeder... a few birds find it, they like what they see and then other birds see/hear them and flock over to see what the big deal is. Likewise, Google very likely does a similar thing, and looks for users flocking to a page. This is how/why a site can be almost unknown, but get a mention in an article on Wired's front page and suddenly get so popular that it floods their servers. It isn't the direct click-through traffic from Wired that causes so much traffic that it floods the site... but instead it is that surge that signals to Google that this new site must be important, causing Google to do all sorts of nice things that then lead to a massive flow of traffic. A LOT of small apparel and inventions get launched viral like this. A good example is people who go on the Shark Tank TV show and get a sudden surge.
It's like being a "made man" in the mafia. Once you're in, you're in. The hard part of getting in...
-ThopHayt