There are several Quality Score factors in Google AdWords but there are many shortcuts. Starting off the wrong way gets very expensive. Your account history with AdWords is part of your QS and part of the price you pay per click.

Sales come from traffic. Free traffic is the best kind. That requires good on-page SEO and off-page backlinks. Backlinks come from article marketing and social bookmarking.

An affiliate marketer without a mailing list is almost doomed to failure. An opt-in list allows you to send a variety of messages to interested prospects. Including sales messages that can begin making you money later the same day.