If you're using AdSense in earnest, it's a good idea to plan to check your AdSense pages about once a day, but you'll also be notified by email about important publisher policy violations, such as "page-level corrective actions."
You can go to the 'AdSense Policy Center' with the blue text in the message, or go to 'AdSense Home → Account → Policy Center' and solve the policy violations. There are many cases where the sense algorithm misidentifies it, so it doesn't have to be a big deal.
Publisher Policy Violation Resolution Tutorial

This is a change we've made as we update our policies. Previously we had to fix a policy violation, but now it's broken into a "serious policy violation" and "advertiser demand limit."
"Severe policy violations" must be amended according to the terms and conditions, but content that does not violate the terms but may be subject to "advertiser demand limits" (non-age content, slightly stronger content, etc.) may be used if the user wishes to run the ad. You can decide to modify the, and leave it alone if the ad doesn't need to run.
If the problem is "shocking content," you must remove the shocking part of the URL. If the content is shocking, remove or change the entire content, or delete the ad code to give up the impression as a "stop ad serving." You must decide.
If you're applying AdSense's "automatic ads" feature in the process of requesting delivery, and you're having difficulty removing only a single page, go to "AdSense → Ads → Automated Ads → Advanced URL Settings → New URL Group" You can fix this by creating a URL group, selecting or adding pages where you want to stop showing ads, and leaving all ad formats unselected.
Just in case, when you insert an AdSense ad, you create an ad code by wrapping the div in a specific class name, such as 'Adsense_1' in <div class="Adsense_1">광고 코드</div>
<div class="Adsense_1">광고 코드</div> <style> .Adsense_1{display:none;} </style>
You can submit up to 200 review requests at one time, and on average, they resolve within a week.