Tagline

General
A tagline is a variant of a branding slogan typically used in marketing materials and advertising. The purpose of a tagline is to create a memorable phrase that will sum up the tone and premise of a brand or product, or to reinforce the audience's memory of a product. Some taglines are successful enough to warrant inclusion in popular culture.

Internet
A tagline is a phrase or short sentence that appears directly below a Web page’s masthead. The tagline functions to quickly identify the purpose of the website. It may be a subtitle, an organizational motto, or a vision or purpose statement.