Adgroup setup is really simple since there are no special parameters or tricks. What I will explain here are just industry best practices. If we look within AdWords editor for the adgroup setting you will notice that there are only 4 options, Name, Status, Max CPC bid, Max Content CPC bid.

Adgroup Name [...]

The idea behind adgroups is to group keywords around the idea of a specific marketing message. When you consider your adgrouping structure, don’t base it on the keywords, base it on the marketing message instead. Google only allows for 100 adgroups per campaign, and since we are limited on the amount of adgroups we can [...]