When you create a new campaign, you can control how long it runs. This feature comes in handy when you already know the date you want your campaign to end—for example, after a promotion or offer expires. Just set an end date in advance and, when the day comes, you won't have to change it manually. You can also set a start date for a campaign dedicated to an upcoming holiday, for example.
The default setting for each ad campaign is to have no end date, so that the ads are able to run indefinitely. You can change the setting at any time to have your campaign end on a specific date. When you select an end date, your campaign will end on that date at 11:59 p.m. in the time zone that you have chosen for your account.
Learn how to Set automatic campaign start and end dates.