On the right side, scroll down and click on Taskbar. Choose Taskbar behaviors. Uncheck the Show hover cards for inactive and pinned taskbar apps option to disable the hover cards.

You can hide your taskbar using Windows 11 settings, but that won't hide it completely. The only way to do that is to use a third-party application.

Don't like the Windows 11 taskbar? There are some tweaks you can make to remove some of the annoying bits, and to bring back some of the features from the Windows 10 version.