The exact procedure for this varies depending on the provider, but in principle is identical in each case:
- Register with your provider.
- Copy the generated TXT record (your Google Security Token).
- Store the TXT record in your DNS configuration.
Google also provides detailed instructions for the most common providers at https://support.google.com/a/topic/1409901?hl=de.
Once the TXT entry has been saved, go back to the Google Search Console and click on "CONFIRM".
If everything went well, the confirmation "Ownership confirmed" will appear and the Google Search Console has been set up successfully! You now have a property that provides all data from all subdomains and regardless of the protocol. If you want to create additional properties that track parts of the domain property separately, you will find more information on this in the next section.
Note at this point: As DNS changes usually take some time, it may happen that "Confirmation of ownership failed" is displayed for the time being. Wait a while and try again later by selecting the relevant property under "Not confirmed" in the property selection at the top left.