Hello, Does Facebook PPC's traffic is good traffic comparing it to adwords? Does it more expensive than adwords?
Its difficult to say if its better than adwords traffic. There are some good options to target the traffic specifically. I have found though that for competitive keywords the cost per click is high, there's nothing you can really do to lower the cost either. I guess you have to make sure that the ad is very relevant to the content.
My experince is that it depends on what you sell. People are in a certain mood when they are facebooking.
Facebook's traffic is quality. They also have a lot of users now, so you can do some serious traffic. Like google, one of the bigger problems these days is getting ads approved. They now have many advertisers and are being more stringent with their rules. Just like any traffic source, there are niches that are cheaper and profitable, while there are others that are over saturated.
There are DEFINitELY certain niches that will yield better results on Facebook than Google. For instance: a firend of mine owns a clothing boutique in a $100 spend on Facebook, she'll actually get 100 fans on her facebook page and 5-10 customers to her walk-in store. On Google Adwords, spending $100 she'll get 10-20 people who will email her and MAYBE 1 person come to her store. Obviously, in this case Facebook OWNS.