If you're not using the task manager you're missing out. It's a way to see what's going on under the hood, close processes that are using too many resources, change priority in applications and games to make them more responsive, and more.
In Windows 10 I used to right click in the taskbar to get the task manager.
In Windows 11 that doesn't work. However there is still a shortcut to get the task manager up so you don't have to search through apps to bring it up:
Right Click the Blue Windows Icon
Right click the blue "four squares" icon and select the Task Manager.