Sometimes, your campaign will stop. Most of the time, it's because:

The identity attached to the campaign can't "work" at that time of the day.
To check this, go to Identity > Click on the identity > Select Limits & Working Hours:

You can specify when your identity will start & stop working. If you scroll down, you'll be able to check a box if you want it to work during weekends (are you sure you want this ?) & the time zone to consider for these hours.

We love Linkedin 😎 But sometimes, when you're working too hard, Linkedin doesn't love you & will disconnect your account. Same for your email :)

To check if your identity is still connected, open your Identity section.

Your notification center will alert you if a disconnection occurs with a notification.

This one's easy 😉

Your campaign will run until your subscription is active. When your subscription becomes inactive (end of trial, unsubscribe, too many payment errors...), your campaign will be paused. 

Or on your billing tab :

To Activate your Account, go to Identity > Click the Activate button and follow the guide.

Don't worry, everything will start again once your subscription is re-activated.