A tagline helps users quickly understand what the store is about. It is typically short, a few words only. You can often see it right below the logo, or in a row above the logo.
A USP (unique selling proposition) is similar to a tagline, but usually a bit longer. It clarifies how the store is differentiated, how it is unique.
A guarantee helps remove barriers to purchase by making users feel more comfortable about buying form your store. This is often included along with other “unique selling bullets” below the main menu.
Offers or promotions
Offers or promotions are often time sensitive and placed in the first row, at the top of the page.