It has to be... obviously Google, simply because it helps online people to search for their requirements... easily and instantly! Regards, RightMan
Google.com, who else? Most people have it as their home page, firefox has it as it's default homepage too. No one beats google in the search arena. They are the gateway to the internet. Do you guys think any other search engine could EVER beat google.com? I don't think so.
Most popular for youngsters is Facebook these days but in general it's Google.com which is the most popular in terms of traffic generated.