how to add my site on webmaster

login with your gmail
Click on "Add a site"
Enter the domain name / URL of your Jimdo site
Copy the code you may get as an HTML tag.
Paste the code in your site Jimdo in Menu ->  Settings -> Change the HEAD
confirm with search console
Your site will verify

Copy html tag and paste this code your website

You have to add Google webmaster code in the header section of the website.