If you want to insert Adsense ads manually, here I lay out some AdUnit sorts.
A. AdSense for Content
Showing ads from those who place ads on Google (Google Adwords). Display format can vary, there is a picture, unisex the only text. Both are divided again in various forms, among others:
Leaderboard (ad elongated horizontal)
Banner
Scycrapper and Wide Skycrapper (longitudinal vertical)
Square, Medium Rectangle and Large Rectangle (rectangle-shaped ad)
For more details see the link below:
http://www.google.com/adsense/addformats
B. AdSense for Search
Displaying Google Search Engine facility diwebsite you. You will be paid if anyone using the search engines.
C. Adsense for Referral
Currently consists of 4 kinds (bias increases again in the future in collaboration with Goolgle namely:
Referral to "Google Adsense"
Referral to "Google Adwords"
Referral for "Firefox"
Referral to "Picasa"
When there is someone / visitors coming to your site / blog, click the link Referral above .... download and then install the software on their computers, then You get 1 (one) dollar (U.S.) from Google