There are a lot of different ways that savvy people monetise the web, of which AdSense is only one. This article explores the good and bad of using Adsense and the Adwords platform and gives you an overview out of how to get the best out of them in the early days.
Adsense and AdWords – why use them?
How to Improve Your Click Rates with AdWords A/B Testing
Advertising on Google isn't cheap. AdWords A/B testing allows you to steadily improve the performance of your ads without risking your entire ad budget.