There are many kinds of ads - those who tries to sell you something, and those who tries to establish "branding".
The first type is largely ignored by the majority of users, and the 2nd type, can't be ignored, even if the user tries to ignore it (those using adblock notwithstanding, but they are a minority).
The branding type of ads are the most effective, and are the type of ads that would make or break facebook.
Google, on the other hand, seems to excel at the first type - and it makes sense, because when people search, they ususally want to find some product/service, and those ads gets to them at the right time.
The first type is largely ignored by the majority of users, and the 2nd type, can't be ignored, even if the user tries to ignore it (those using adblock notwithstanding, but they are a minority).
The branding type of ads are the most effective, and are the type of ads that would make or break facebook.
Google, on the other hand, seems to excel at the first type - and it makes sense, because when people search, they ususally want to find some product/service, and those ads gets to them at the right time.