In your store's Admin area, go to the Design > Blocks
Banner Block allows you show existing banners or group of banners in Storefront. Block can show banners as is or with special wrapper as example of block - Main Page Banner Slider.
1. Create banner or few banners assigned to one group
create new Banner using Design > Banner manager
2. Then create new block with Banner type.
Go to Admin > Design > Blocks and click the INSERT button, select Banner block Tab. Fill the following fields:
Custom Block Name: block name visible in Admin > Design > Layouts
Custom Block Title: name shown on Storefront
Use block wrapper (appearance): recommended value is Automatic
Use block's frame: set ON to display frame
Custom Block description: internal use only - not required
Banner Group Name: Select banner group to display: banners and banners groups can be added at Admin > Design > Banner Manager
Selected banners: Select banner to display: banners and banners groups can be added at Admin > Design > Banner Manager
3. Add block to page Layout
To show block in storefront please add it to some page in Design > Layouts