Add file at the root of mapped domain in multisite

The simplest solution to add the file ads.txt at the root of a mapped domain is to install a plugin to handle that. In my case, I searched the plugins directory for Ads.txt.

I have installed a plugin called Ads.txt Manager. After installation to to plugin’s settings and paste the text that you have in the Ads.txt file. Click save, and you’ll see that the ads.txt file is now visible on domain.com – the mapped domain.