Xtra Forx

Brand is the "name, term, design, symbol, or any other feature that identifies one seller's product distinct from those of other sellers e.g Music."^[1] Initially, Branding was adopted to differentiate one person's cattle from another's by means of a distinctive symbol burned into the animal's skin with a hot iron stamp, and was subsequently used in business, marketing and advertising. A modern example of a brand is Coca Cola which belongs to the Coca-Cola Company.
A brand is often the most valuable asset of a Corporation. Brand owners manage their brands carefully to create shareholder value, and brand valuation is an important management technique that ascribes a money value to a brand, and allows marketing investment to be managed (e.g.: prioritized across a portfolio of brands) to maximize shareholder value. Although only acquired brands appear on a company's balance sheet, the notion of putting a value on a brand forces marketing leaders to be focused on long term stewardship of the brand and managing for value.
The word "brand" is often used as a metonym, referring to the company that is strongly identified with a brand.
Marque or make are often used to denote a brand of motor vehicle, which may be distinguished from a car model. A concept brand is a brand that is associated with an abstract concept, like breast cancer awareness or environmentalism, rather than a specific product, service, or business. A commodity brand is a brand associated with a commodity. Got milk? is an example of a commodity brand.

Excerpt from wikipedia