Your campaigns can have different statuses based on their lifecycle. You can easily see the status by the color on the left side of the campaign row in the dashboard.
Active: this campaign is currently in progress.
Pending Review: this campaign is in review to launch.
Completed: this campaign has passed its end date.
Disapproved: this campaign is not approved to run. You can edit and resubmit.
Draft: this campaign is in draft mode.
Building Audience: SendGrid Ads is building the audience for this campaign