Go to a page you trust that has blocked ads.If you trust a site, you can add an exception to allow ads on that site. Turn on Blocked on sites that tend to show intrusive ads (recommended).In the top right of your Google Chrome, click More Settings Advanced Site Settings Ads.You can change your settings to allow ads on all sites. Note: The instructions in the next section describe how to deactivate the ad blocker in Google Chrome if you have an ad blocker in a different browser, these instructions won’t apply. To test whether an ad blocker is blocking your ability to see your ad preview, open Google Ads and check for the error in at least 2 browsers, as well as in a private browser window ('incognito mode' in Chrome).
To disable third-party ad blockers, consult the developer’s guidance. This article describes how to check if an ad blocker is activated in your browser and how to disable Google Chrome’s ad blocker. The error may not show consistently across all browsers or on some networks if you access Google Ads through more than one browser. If your browser is running an ad blocker extension (for example, Google Chrome’s ad blocker or another third-party ad blocker), a red banner error message may appear at the top of your Google Ads and you may be unable to see your ad previews while using Google Ads.