Hard to say really. I would presume that it's one of the social networks, most likely Facebook considering it's widely used by people in both western and eastern countries.Oh, I was only trying very hard to be really sarcastic. Of course, google.com is the most popular 'website' in the virtual world but I was actually talking about the most popular webshite there. I did succeed because it did not go unnoticed.
Only in few countries ,I would probably say that it's Google, to be honest. I mean, most people use Google to get to other websites. It makes the most sense and is the logical answer