Click App Content-->In-app pages-->Add new widget--> Banner
Here you can add banners which can be used to show the special offers , new items released etc. And you have to mention the actions of the banner. Then by clicking the banner in your app , the control will direct into the action mentioned.
Click upload image then insert an image and mention the action to be performed.
1.1.2 SliderHere you can add multiple banners as sliders. And you have to mention the actions of each image on the slider. Then by clicking the images of the slider in your app , the control will direct into the action mentioned.