Different Between Ad Group and Keyword Ideas?

[autospec]

I like to know the different between Ad Groups concept and Keyword concept in the google keyword planner as well as PPC? What would be the best choice in order to promoting my ads for affiliate my affiliate marketing?

 

[sbweb]

Ad Groups ideas are organized by groups of relevant keywords, while Keyword ideas are displayed individually. Ad Groups ideas are helpful in saving you time because you can easily add Ad Groups (groups of keywords) to your Campaigns. These tools are really meant to help you discover keywords and apply them to your Adwords Campaigns. If you are doing keyword research, then running searches at the keyword level will help you more.