Okay hello every one due to my research about many topics i have heard a lot of issue google Adsenes but hey it not a big deal

Because Probably after you have been approved by Google AdSense to serve ads on your site, but to your notice one day you check your AdSense earnings and you get a notification from AdSense which goes like this:
Earnings at risk – One or more of your site does not have an ads.txt.file.
Fix this now to avoid severe impact to your revenue.
Read more https://www.emvidowealth.com/learn/how-to-fix-google-adsense-ads-txt-file-error-fast"