By default, the PowerShell 3.0 ISE editor loads code snippets automatically, and you can then select and insert any of these by pressing CTRL+J.
Custom code snippets are stored in a special folder that you can open like this:
$snippetPath = Join-Path (Split-Path $profile.CurrentUserCurrentHost) "Snippets" explorer $snippetPath
As you see, custom snippets are stored in a folder, and each is a file with the extension ps1xml. By opening this folder in your File Explorer, it is very easy to delete unwanted snippets or share some of them with friends and colleagues.