Google adwords Facts

[megri]

10,000 campaigns (includes active and paused campaigns)
20,000 ad groups per campaign
5,000 keywords per ad group
300 display ads per ad group (includes image ads)
4 million active or paused ads per account
3 million keywords per account
10,000 location targets (targeted and excluded) per campaign, including up to 500 proximity targets per campaign*
100,000 active ad extensions per account
1.3 million references to ad extensions per account