1. Get ads approved in advance of when you want them live.
2. Set up accounts and campaigns well in advance with no works about approval time
3. Prepare for busy periods such as Christmas holidays
4. Time saving
1. This also means any paused ads in an ad group can be reviewed. Any old ads in accounts could get dissaproved and now disapproved ads can cause account suspension so keep an eye on old defunct creative lying around in your accounts and delete them!