A lot of the traffic google gets is people looking to buy e.g.: "refrigerator reviews". Everyone going to google is looking for something, even if a lot of the

A lot of the traffic google gets is people looking to buy e.g.: "refrigerator reviews". Everyone going to google is looking for something, even if a lot of them aren't looking for a product, when they are looking for a product it is to buy it. Facebook and Twitter, however, are sites people use for socializing, and if they're looking for something, its usually links to news. Thus, google's traffic is more monetizable. This is not to say that Facebook and Twitter won't grow up to be big businesses with really lucerative monetization... its just that it isn't as clear. I think google found its strategy in adwords a lot faster (2000 is when it was launched) as a result, while facebook ads are there, they've not been as successful and facebook has been around a lot longer than google had when adwords came out.