In recent times the term 'logo' has been used to describe signs, emblems, coats of arms, symbols and even flags. At the end of this article several examples of 'true' logotypes are displayed, which may generally be contrasted with emblems, or marks which include non-textual graphics of some kind. Emblems with non-textual content are distinct from logotypes properly so-called.

The uniqueness of a logotype is of utmost importance to avoid confusion in the marketplace among clients, suppliers, users, affiliates, and the general public. To the extent that a logotype achieves this objective, it may function as a trademark, and may be used to uniquely identify businesses, organizations, events, products or services. Once a logotype is designed one of the most effective means for protecting it is through registration as a trademark, so that no unauthorised third parties can use it, or interfere with the owner's use of it. If rights in relation to a logotype are correctly established and enforced, it can become a valuable intellectual property asset.

Many people believe that a logotype is just a graphic symbol or sign. This is, however, not the way it is defined by graphic designers and by advertising professionals. A logotype consists of either a name or a sign and name. The images at right show examples of two kinds of logotypes, and an emblem.