Google and web site traffic

[Natural Elements]

Originally Posted by pravir

How google get the traffic data of my site if I would not install google analytics. I dont think google can access the traffic data of all the sites which hasnt installed google analytics. And from billions of sites how many sites has installed google analytics...i guess not majority of the sites. If google cant access the traffic data of majority of the sites then how come the traffic data is useful in google algorithum.??

I think Google has his own statistic data from your indexed pages on traffic, visit duration, etc...