Which is the best?

[Saki]

There are many sites to use for paid ads these days and for conversions. Out of Facebook, Bing, and Google, which do you think has the bets system?

 

[ritchie]

Apart from Bing (that most people hardly use) I think both Facebook and Google are equally effective. However, I don't think you can use any of these singly. A combination of these media looks like the best system.