Social media isn’t for every business. But as more and more people log on to Facebook, tweet out every little thing, and broadcast their location with Foursquare, social media is increasingly becoming an important part of the marketing mix for businesses, large and small.

Here, then, are the latest traffic numbers for the most dominant player, Facebook. We always joke with our clients that Facebook and Twitter might not be for everybody, but with numbers like this, we would be committing “marketing malpractice” if we didn’t at least tell you about it! It’s worth noting that Facebook now has more visits than any other site on the web, including Google.

Experian HitWise Top 20 WebSites Ranked by Visits