On homepage, when you click on Add Content button, popup window will appear which shows several items to select.
Following article will explain How you can add/remove option for ex. Catalog categories?
- Navigate to System UI - WIdgets.
- Select widget which you dont want to display for ex Catalog Categories.
- Mark as inactive.
- Go to homepage
- Click on Add Content and you won't see 'Catalog categories' anymore.
- Similar way you can add any of your widget to be displayed on Homepage.