This is the simplest Facebook ads reporting step by step guidelines. See: How to report a problem with Facebook | Step by step
That process relies on automated tools, and in some cases human review, to check ads against the Facebook Advertising Policies.
In the course of the review, if the Facebook ad review team detects a violation of the policies, they will remove the ad.
Bear in mind that Facebook continuously reviews ads on the platform based on many signals, including user feedback, to improve the integrity and relevance of advertising on Facebook. See: Where is my Blocked List on Facebook
How To Report Facebook Ad
To report Facebook ads, do the following;
ON BROWSER
1. Open your Facebook account as usual
2. Go to the Facebook ad you want to report
3. Click “…” next to the ads. This will open a drop-down menu
4. Next, click Report Ad. This will prompt a dialog box to pop-up which many options that describes what you could report the Facebook ad about.
5. Select any of the options that best describes what you want to report the ad about. This will activate the continue button at the bottom right of the page.
5. Next, click on the Continue button.
6. Finally, click Done.
That is how to report Facebook ads.
ON ANDROID APP
To report a Facebook ad using your Android device, do the following;
1. Tap on the Facebook app icon in your device to continue to your news feed. You’ll need to log in to your account if you’ve not already done that.
To log in to your account, from the Facebook homepage, enter your login details in the spaces provided and tap on the login button and you’ll be taken to your news feed.
2. From your Facebook news feed, locate and click on the three-vertical-dotted icon next to the ad you want to report. This will open a drop-down menu.
3. Tap Report Ad from the drop-down menu. This will open a box with the list of options that describes what you want to report the Facebook ad about.
4. Tap one of the options that best describes what you want
5. Tap Continue
6. Tap Done
ON iPhone
1. Tap on the Facebook app icon in your device to continue to your news feed. You’ll need to log in to your account if you’ve not already done that.
To log in to your account, from the Facebook homepage, enter your login details in the spaces provided and tap on the login button and you’ll be taken to your news feed.
2. From your Facebook news feed, locate and click “…” next to the ad you want to report. This will open a drop-down menu.
3. Tap Report Ad from the drop-down menu. This will open a box with the list of options that describes what you want to report the Facebook ad about.
4. Tap one of the options that best describes what you want
5. Tap Continue
6. Tap Done
See: How To Report A Comment On Facebook | Quick Facebook Reporting