The templates are a collection of apps provided by Microsoft which can by turned on and used by your company quickly and easily. The collection of templates is ever-expanding, but once they connect to your data, they are ready to roll out. The templates available at the time of writing are:
For more details, check out the Return to the Workplace sample app
There are some great templates out there ready to use in your company, but you may not be familiar with PowerApps or looking for something of an introduction to the platform. The Microsoft Learning centre has a variety of training courses with exercises that you can participate in and work through which will work through each aspect of the Power Platform and the types of apps or Flows available to you. You can also download one of the two PowerApps training apps which are in the PowerApps templates:
Microsoft is constantly rolling out new solutions or templates using the PowerPlatform, so spend a little time, check them out and see which ones you can utilise in your company!