SafeSearch is a feature of search engines that can help you filter explicit or offensive content. When you enable SafeSearch, the search engine filters explicit or offensive content and returns search results that are safe for children, you or at work.
You can use Cloudflare Gateway to enable SafeSearch on search engines like Google, Bing, Yandex, YouTube and DuckDuckGo.
Visit 'Policies'. If you don't have a policy, create one.
Visit 'Overview' tab in the policy.
Scroll down to see the 'SafeSearch' card
Enable the switch inside the 'SafeSearch' card
You can test if SafeSearch is working by performing dig on the search engines. Instead of returning the regular IP address, you should see the CNAMEs returned like below: