Mood boards serve as great tools to convey your idea in a physical or digital form. They help in better visualization of what the final project will look like. Creative ideas can sound very vague when explained through words, but if you add pictures, text, visual metaphors, fonts, complete with a color scheme and similar attractive real things together, it will create a better visual presentation of your idea. Mood boards also help in keeping the members of the design team on the same page as there is a visual clue to fall back on when in doubt.