Deleting a SharePoint Online Subsite through Powershell and through web

How to delete a SharePoint Online Subsite through Powershell and through web. 

Step 1: Please install the first msi from this link : https://github.com/pnp/PnP-PowerShell/releases/tag/3.9.1905.3 

Step 2: After installing, run your powershell as administrator. 

Step 3: Connect the root site of your site where you want to delete the subsite: 

Step 3a: Connect-PnPOnline -url "https://domain.sharepoint.com/sites/classicsite" 

Step 4: Remove-PnPWeb -Url subsite1 

Other useful command which you may need - Connect-MsolService