If you want to use Google Search Console (previously Google Webmaster Tools) to monitor how Google sees your website, then All in One SEO Pack offers a convenient way of authenticating your site with Google Search Console.
First, go to Google Search Console and log into your Google account.
Once you’re logged in, you need to add a new property (top of the left-hand menu). Enter the domain name of your website.
You’ll now see a screen with two sections: “Recommended verification methods” and “Other verification methods”. Click on the “HTML Tag” option under “Other verification methods”.