Microsoft’s PowerShell for SharePoint Online (SPO) provides administrators the capability to automate routine tasks using a command-line shell that’s associated with a powerful scripting language. This command line utility is structured, intuitive, provides consistency, and is available across all Microsoft products, making it easier for an administrator to transition their PowerShell knowledge and experience from one product to another.
Managing SharePoint Online using PowerShell is an efficient way for your M365 and SPO administrators to manage SharePoint sites, site members, site groups, and many other SPO components in bulk. As an example, using PowerShell, you can easily add hundreds of users to a site or modify properties of a site, add and modify permission groups to sites, or modify properties of a SPO site. It is a tool that every administrator should have in their tool belt to streamline their management practices by managing SharePoint Online components in bulk, and by writing powerful PowerShell scripts that can be scheduled to run, or used repeatedly.
For additional information including how to prepare to use PowerShell with SharePoint Online, how to retrieve help on PowerShell for SPO, the steps necessary to connect to SPO, along with some examples of SPO PowerShell in action, I invite you to view my Managing SharePoint Online using PowerShell article available at TekkiGurus.com