Widgets are reusable blocks that contain HTML template as well Javascript Controller to make it self-sufficient. You can add widgets in the design theme by following the steps given below:
Go to design theme in StoreHippo Admin Panel.
Go to HTML section and click on Show all widgets.
Now click on +Add a new widget.
Here, enter the widget name and template as required.
Click on Save when you are done. Your widget will be added successfully.