6. Verify domain ownership via DNS record in Google Search Console
What is verification?
Verification is the process of proving that you own the property that you claim to own. Search Console needs to verify ownership because verified owners have access to sensitive Google Search data for a site, and can affect a site's presence and behavior on Google Search and other Google properties. A verified owner can grant full or view access to other people.
You only need to authenticate with the main domain (non-www), the subdomains and subfolders will also be automatically authenticated.
Instruction for verifying domain names with Google Search Console
Verify domain names with Google Search Console in just 5 steps: