A mood board is the earliest tangible artifact in a design project. Before any plans or renderings, it captures intent — what the space should feel like, what its references are, what materials and palette will define it. Designers use mood boards to align with clients before committing to specifications; consumers use them to crystallize a direction before shopping.
Mood boards historically were physical: a corkboard with paint chips, fabric swatches, magazine tear-outs, and pinned-up photos. Digital tools (Pinterest, Milanote, Figma) have made them mostly virtual, which lets you iterate faster but loses the tactile material check that physical boards offer.
The best mood boards are both broad enough (5-15 references) to give a clear direction and tight enough that you can see the through-line. If a mood board needs an explanation, the references aren't doing their job.