Google is clarifying its Google Ads review process to explain how it detects policy violations. See details here: https://support.google.com/adspolicy/answer/7187501
TL;DR:
The review process combines Google’s AI and human evaluation (and is constantly changing). Google disapproves ads, assets, destinations, accounts, and other content that violate Google policies.
In determining whether an advertiser or destination is violating their policies, Google reviews information from a variety of sources, including:
- ads
- accounts
- websites
- content
- user complaints
- consumer reviews
- regulatory warnings and rulings
- other third-party sources
Google’s enforcement technologies use Google’s AI, modeled on human reviewers’ decisions. The policy-violating content is either blocked from serving by Google’s automated models or by manual review. Where a more nuanced determination is required, content is flagged for further review by trained operators and analysts who conduct content evaluations that might be difficult for algorithms to perform alone (for example, because an understanding of the context of the ad and account is required). The results of these manual reviews are then used to help build training data to improve the machine-learning models.
Here’s the thing:
These automated procedures often make mistakes (AI generates “false positives“). Google often disapproves your ads for faulty reasons. You need to apply for a review when that happens — otherwise, your ads won’t show!
Luckily, I have a script which can help you detect when Google disapproves your ads. (Note that not all disapprovals get reported via notifications in the Google Ads UI.)

[Google Ads Script] Disapproved Ads Alerts
URL: https://nilsrooijmans.com/google-ads-script-disapproved-ads-alerts/
What it does:
This script checks all enabled ads in your enabled ad groups and campaigns and sends an email alert if any of the ads are disapproved. It will add the alert to a Google Sheet so you’ll have a clear overview of the issues.

Why you’d care:
Ads get disapproved for numerous reasons, and not all disapprovals get your attention. Google uses its AI to review your ads, and this AI often makes mistakes and often disapproves ads that have been running for months without problems. When this happens, you want to be in the know. This script assures that you are.
– Nils