My Backlink - After Google introduced the search console beta version, it's now finally Google or Blogger releases ads.txt directly on the Blogger dashboard on January 31, 2018.
Ads.txt is an initiative of the Interactive Advertising Bureau Tech Lab (IAB) to promote and improve transparency in program advertising. This is an easy way for Adsense publishers to clearly point out to authorized buyers to sell their inventory.
Actually for Blogger Ads.txt already existed but now you can edit Ads.txt as you like and for you who get warning message like this.
Your earnings are at risk - One or more of your ads.txt files do not contain the AdSense publisher ID. Fix this issue right now to avoid having a serious impact on your revenue.
To enable Ads.txt on Blogger, you can set it in Blogger Dashboard > Settings > Search preferences > Monetization > custom ads.txt > Then click edit select Yes and fill in the following code in the column ads.txt.
google.com, pub-0000000000000000, DIRECT, f08c47fec0942fa0Please replace pub-0000000000000000 with your Adsense ID, then click Save changes.
Adsense ID can be found in Blogger dashboard or Google Adsense buddy like the example below.
To check whether Ads.txt is enabled, you can check in the browser search tab with links like this.
http://www.your_domain.com/ads.txtReplace your_domain with your blog address.
We suggest you activate ads.txt manually in all of your blogs from bloogers serving Adsense ads to ensure that we have activated ads.txt with the account currently in use, as in the tutorial above.
Similarly about How To Easily Enable Ads.txt on Blogger.
Good luck
