TYPES OF ADS UNIT IN ADSENSE

There are three types of Ads Units after you publish them:

1: Active: Ads are active and being displayed somewhere.

2. New: Newly created Adsense code, would become Active, once Google team approves it.

 3. Idle: The Ad units which are active but not being displayed anywhere.

Hope this resolves the issue. For any thing else, do comment or get in touch.