for a company to do training, when it comes to AdWords, their staff told me that they just do not do Internet advertising content, keyword search advertising.
I asked her why?
she said: the contents of the network to bring only 8 cents per click, and keyword search ads are at least a few cents per click, there are a lot of $one or two a click. So they only put content networks.
this sounds reasonable, but not in fact. I then asked her: how many clicks can the content network bring to a sale?