When ADsense first began, I was as confused about its workings as anybody else. I could never understand why anyone would want to post the ads of their competitors on their site and risk turning away new clients. I tried to stay away from it for a long time as I wanted to keep the clients I already had. I also did not use banner ads, or any other type of advertising. This has been somewhat effective for me till now. But I think, I ought to change if I need to increase my business opportunities. What do you think of these things?