If you wish to archive your site and no longer want to use it, please follow the steps below;
Go to Dashboard and click on the ellipsis icon next to the site name.
Click on the Archive option from the dropdown menu.
It will show the warning message.
Click on Proceed and your site will be archived.
You can also bulk archive sites by following the below steps;
Go to Dashboard and select all sites that you want to archive by clicking on the checkbox next to the site title.
Take action dropdown button will appear on the top.
Select the Archive option from the dropdown menu.
Click on Proceed and the selected sites will be archived.