Can you guess?
I'll give you a hint…. it's not this one.
It's either Google or Facebook.
If you said Facebook, you would be right.
Facebook jumped to #1 this year as the most visited website.
However, even if you answered "google", you still weren't that wrong. Because Google owns many properties (like YouTube).
When look at it that way, the combination of Google properties accounted for 9.85 percent of all U.S. visits. Facebook properties accounted for 8.93 percent, and Yahoo! properties accounted for 8.12 percent.[Source]