Recently Google notified the Google AdSense publishers through a mailing that Google Chrome will block those ads which don't comply with their policy.
The Chrome Will Support The Better Ads Standards.The ads which are annoying and interrupt the user's experience will be blocked by Chrome by 9th July of 2019. The internet giant Google always try to make a healthy ecosystem for publishers, advertisers, and visitors. But sometimes when we visit on websites, there are lots of ads on the top at the side and other places. It is really annoying for the viewers, especially when someone uses mobile devices to visit a site, a big ad almost block the page. Google has been working to fix that issue for a long time. Google detects those as the abusive ad experience, and last year, it blocked abusive ad experiences of some North American sites. Recently Google started to send notifications to site owners through their AdSense mail ID.
Last year Google joined the Coalition for better Ads; it is a group that offers some specific standards to ensure the ad industry improve the ad experience for the visitors.
Different type of ad types come under the Global better Ads Stander; ads like pop-up ads for both desktops and smartphones, auto-playing video ads, ads with count down, prestitial ads, full-screen scroll over ads, large sticky ads, ad density above the 30 percent.
To check whether your site is under Abusive ad experience or not you try Google Webmaster Abusive Ad Experience tool. It is indispensable for Ad publishers because if someone has the problem and does not fix it, soon Google Chrome will start blocking ads on their site.