Step 1: From the admin left panel, click on Settings.

Step 2: From the available options, select App Categories.

Step 3: Navigate to the top right corner of the App Categories interface and click on the Add New Categories button.

Step 4: A pop up will open. Enter the name of the new app category in the field given.

Step 5: You can also choose a color to assign to the new category.
Step 6: After configuring these settings, click Add New. Your new category will be added.