The best PPC network for Advertisers

You should find cheap keywords but not cheap network. The cost of click is determined by marketers competition, but not by network itself.

There is no such thing as "best". What you should be asking is what network is appropriate, although you equate best with cheaper which is also the wrong approach.

Think of advertising in newspapers. Which is appropriate for your product? If you go with cheapest, that will probably not give you the results you want. You would not advertise in a political oriented paper or magazine if your product is sports related.

Same for PPC networks. Google is great because of everybody using it for search but I would add Bing as well. Google also has a vast content network, should that be something you should be doing plus Shopping and remarketing. Can't go wrong with Google to have the most reach. Supplement with other networks as appropriate.

Click costs are dependent on competitors, what each is willing to spend. These are the market forces and the reason insurance companies are willing to spend tens of dollars for a lead. Other networks may cost less (but probably not all that much) but at the expense of a much lesser reach. The other side of the coin is how well your page will convert. It won't matter how much a click costs if you can't convert any.

I'm going to try FB Ads 1st and look if it'll work for earning and than will try Adwords & Bing.

I really need a traffic which converts. especially US traff.

Google Adwords is best PPC network for advertisers.