Inside ConnectExplore, you may see this message beside your ad account “(Banned by Facebook).”
Here are some specific reasons for banning your account:
Your ads violate Facebook’s community standards. For example, your ad contains hate speech, is spammy, or attempts to gather sensitive personal information. (Please see Facebook’s Community Standards.)
Your ads contain bad grammar and punctuation. They may also contain excessive symbols, characters, or profane language.
A lot of your ads had been disapproved previously.
You’ve created too many ads even if your ad account is still new.
Your landing page has issues. For example, it has content that’s completely different from the ad or is an error page (404).
You repeatedly violate Facebook’s advertising policies. (Tip: Go to your Ads Manager > Account Quality to check which policies you’ve violated.)
Remember that Facebook screens all of your ads to ensure that they satisfy its rules. Make sure that you’re familiar with Facebook’s policies especially if you’re likely to stumble into some violations that may be related to your niche/industry.
What to do next?
Facebook provides instructions on how to troubleshoot a disabled account right here. Facebook allows you to fill out a form if your account has been disabled by mistake and also make an appeal.