What's a logo (design)?

A logo is a graphical element (symbol, emblem, icon, sign, ideogram) that, together with its logotype (a uniquely set arrangement of typeface or typography) form a trademark or commercial brand.

Typically, a logo's design is for immediate recognition and its shapes, colors, fonts and images usually are different from others in a similar market. Usually, a logo is transacted as follows:

A graphical element (symbol, emblem, icon, sign, ideogram) together with a logotype (typeface, typography, script)

An "image" together with a "name". Examples of this category are:

A logotype (typeface, typography, script)

A "name" only. Popular logo design examples of this category are:

A graphical element (symbol, emblem, icon, sign, ideogram)

An "image" only. Popular logo design examples of this category are: