Whats is Google Adsense?
Well, lets start at hello shall we? Adsense is a publishing ad network. You sign up to the system, get approved and at the banner code to your website or blog. Sounds simple right? Well, on your end it is pretty simple, so long as you follow Google's rules.
But on Google's end its not the simple, once you add the codes to your website, google then sends bots to read your websites, they do this to find out what your content on your website or blog is about. After they do this step, there next step is to go through there database and find out which ads on there system will closely match your content.
Once they find all the ads that match your content, then the must go through all those ads and find out which ads will pay you the most for your ad spot. Once that is done, you will see your earning start to go up.
It is important to make sure to use good keywords had header tags (<h1> </h1>) in your writing so Google and find out what your site or blog is about easier.