Dude, don't you know how to read instructions? Well I don't think you need to but everything's user-friendly. You can use its translation if you want if you don't understand English which I bet is the reason. This is just not worth to be answered. Good luck though!
try something like it blends on the color of your site.. or maybe it give emphasize.. maybe try some adsense tips online..
it needs to fit inside your site tip, the harder it is to see that it is a add themore clicks you get