Updated on / dernière mise à jour : 11/12/2021
If you are a publisher, many reasons may explain why ads are not showing on your site. This Google web page may be a good place to start if you need answers regarding such a problem: https://support.google.com/adsense/workflow/10383839.
If you are using a VPN while surfing the Internet, this may also be why you are not seeing the ads though.
Surfshark, which is a popular VPN, has an option called CleanWeb. If it is activated, you will not be able to see ads on your website nor on any other website. Hence, it may be a good idea to deactivate this CleanWeb option while testing ads implementation on your site.