Banners can be used to display an image or block of content, and appear for a specific period of time for a promotion. You can create banners that are visible to certain customer groups, or whenever price rule conditions and coupons apply.
When designing banners for your store, you should take into consideration both the page layout and the theme you are using. Banners are often designed to appear on a specific page, and area of the page. Although the header and footer are a fixed width, the width of the content area, and the sidebars, can vary according to theme and page layout. When designing a banner with graphic images, it is important to understand the page layout, so you can take advantage of the available space.