A layout is a structural template that supports consistency across experiences by standardizing how content should flow across grids, spacing, and sections.
Designers use layout templates for mocks as starting points because they are convenient and fast, systematized and optimized for their use cases. It removes the need for Nerds to recreate the same design over and over again; they only need to fill in the critical details. Layout Templates also help to represent brand guidelines and increase overall product consistency.
Engineers use layout components as building blocks for implementation. Currency provides a variety of such components that can be infinitely nested and composed to create complex, responsive components and page layouts.