Google provides a quick, effective and hassle-free way for merchants to advertise their products and services in the Internet through Google AdSense, a cost-per click and cost-per impression advertising service, where ads are displayed along search and content sites and search results done in the Google network. Merchants will be charged when online users click on the ads that are shown. Keywords are chosen in which the ads will appear, and the merchants will specify on how much they are willing to shell out for each click.