Clicks are noisy and have their problems (especially clickbait), but as far as ranking goes they still blow out of water everything else you can use. Analemma_

Clicks are noisy and have their problems (especially clickbait), but as far as ranking goes they still blow out of water everything else you can use. Analemma_ is right on the money. We need more Lemon Pledge^W^W clicks! Speaking as someone who worked for another big web search engine in the past (not G, not B) And counting good/bad clicks for a given (query, url) pair is just the tip of the iceberg. There's a lot of other interesting stuff you can do with them _if_ you have the data. Deep learning/NLP with clicks as training signal is probably the most exciting area to me, to name one. Unfortunately almost all of the data currently gets nabbed by google, other search engines are just getting by with the scraps. And it's very hard to bootstrap a competitor from scratch - for example Cliqz had to resort to some shady deals with Mozilla just to get any data to start with.