Sometimes we may need to know that what is the version of SharePoint online.
We can get the version of SharePoint online – using the below URL:
https://<your online tenant name>.sharepoint.com/_vti_pvt/service.cnf
SharePoint Online version is: 22.214.171.12428
In SharePoint layout folders are mapped as below:
SharePoint 2013/2016/online : 15
SharePoint 2010: 14
SharePoint 2007: 12