These are the Google AdWords account limits for number of campaigns, ad groups, keywords, display and text ads, location targeting, and ad extensions.
AdWords account limits
- 10,000 campaigns (includes active and paused campaigns)
- 20,000 ad groups per campaign
- 20,000 ad group targeting items per ad group (such as keywords, placements, audience lists, and product targets)
- 300 display ads per ad group (includes image ads)
- 50 text ads per ad group
- 4 million active or paused ads per account
- 5 million ad group targeting items per account (such as keywords, placements, audience lists, and product targets)
- 1 million campaign targeting items per account (such as geo target and campaign-level negative keywords)
- 10,000 location targets (targeted and excluded) per campaign, including up to 500 proximity targets per campaign
- 20 shared negative placement lists per account
- 65,000 placements per negative placement list
- 20 shared negative keyword lists per account*
- 5,000 keywords per negative keyword list*
- 100,000 active legacy ad extensions per account
- 1.3 million references to legacy ad extensions per account**
- 100,000 active upgraded ad extensions per account
- 10,000 ad group references to upgraded ad extensions per account***
- 10,000 campaign references to upgraded ad extensions per account***
Source: https://support.google.com/adwords/answer/1704396?hl=en