A typical logo is designed to cause immediate recognition by the viewer. The logo is one aspect of the brand of a company or economic entity, and the shapes, colors, fonts and images are usually different from others in a similar market. Logos may also be used to identify organizations or other entities in non-economic contexts.

A logo is an iconic symbol designed to represent a company, organization, product, service, and sometimes certain places (e.g., USA).

Distinct aspects of a complete logo:

• Logotype/Wordmark/Lettermark: text or abbreviated text
• Icon: symbol / brandmark
• Slogan: description of the company

The uniqueness of a logo is often necessary to avoid confusion in the marketplace among clients, suppliers, users, affiliates, and the general public. To the extent that a logo achieves this objective, it may function as a trademark, and may be used to uniquely identify businesses, organizations, events, products or services.

Once a logo 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.

There are several elements of a good logo.

An effective logo—

• should be unique, and not subject to confusion with other logos among viewers
• is functional and can be used in many different contexts while retaining its integrity
• should remain effective whether reproduced small or large
• can work in "full-color", but also in two color presentation (black and white), spot color, or halftone
• should be able to maintain its integrity when printed on various fabrics or materials (where the shape of the product may distort the logo)
• displays basic design principles (space, color, form, consistency, and clarity
• represents the brand/company appropriately