A plain-language explanation
Visual identification is a coherent system of brand graphic elements, including, among others, logo, colors, typography, material arrangement and rules of use.
Where it helps in practice
A coherent system of marks, type, colour and imagery supports recognition without sacrificing readability or accessibility.
The decision before implementation
Define brand character and use cases first, then document rules, exceptions and ownership of source assets.
How to verify the result
Review recognition, contrast, behaviour across media and consistency of new work with the library.