They get direct data on click-back. (Search, click, come back to google after a very short time, is a fair signal, in aggregate, that the users don't like that site's search results or other experience factor.)
I don't believe they directly have bounce data, but they infer it from click-back. They have publicly stated that they do NOT use google analytics data to inform organic search rankings.
Comments
Wait, how can google measure that? Do they have a tracker that sees when I leave a site?
They get direct data on click-back. (Search, click, come back to google after a very short time, is a fair signal, in aggregate, that the users don't like that site's search results or other experience factor.)
I don't believe they directly have bounce data, but they infer it from click-back. They have publicly stated that they do NOT use google analytics data to inform organic search rankings.