To verify yourself with Google Webmaster Tools, firstly login/register your account in Google Webmaster Tools.
Copy the meta tag script and go to a separate browser window and login to your Neto control panel.
From the Neto dashboard, go to Setup & Tools > All Settings & Tools.
Click the Add New button.
Name the script Google Site Verification and scroll down to the tabulated Scripts section. In the Page Header section, paste the meta tag script and click Save as per the example below.