If you have a dashboard (Facebook Ads Dashboard for example), you can see the whole situation with campaigns and make the right decisions.
(And if you still don't have a Facebook Ads Dashboard, here you can learn how to create a Facebook Ads Dashboard in 5 minutes... even if you've never made dashboards before) But when there is too much data in the dashboard, this can become a problem.
For example, if you make a Facebook Ads spent chart, you can get the following result: