In one of my previous training videos I showed How To Add Adsense Auto Ads To Your Website which is quite awesome because it is set and forget. Google will then add ads wherever they feel fit. However this is not always a great thing as your website can look quite spammy.
For this reason I manually add ads to a few of my websites so that I have complete control of how many ads are added, where they show and what they look like.
This training video shows you how to create ad units and how to add them to your website.
An easy way to keep track of your ads and codes is by using Shortcoder, you can view this training to set that up:
How To Use Shortcoder to Easily Add Html Banners and Code To Your Posts
If you have any questions please leave a comment :)