The "Campaigns" panel is similar to your Adwords accounts and allows visualization of "all your campaigns" at once.
It is here that you will sort your lists of keywords in different Ad Groups.
The integrated automation tools will enable you to gain a maximum of time.
Structure of an Adwords account:
It is structured in 6 principal blocks.
The "Account" Level:
Account Management in GKM
"Campaign" Level
"Ad Group"Level
"Keywords" and "Matching Options" Level
"Ad" Level