As everything in user experience design your mood board should be focused on meeting user needs and problem-solving.
The technique of mood boarding is popular not only in design field but among many creative professionals. Mood boards are literally boards (digital or material) which people fill with different kinds of things from photos to various textures so that they could visualize ideas and concepts.
Unlike wireframes and prototypes, mood boards don’t show the detailed picture of a future project. They are meant to transfer the right mood and bring the emotions expected from a product.
Mood boards are a useful tool helping designers effectively collaborate with clients and team members. Boards can be easily created within a tight time frame and turn an abstract idea into a real one. This way designers can effectively share their ideas with the others because visual material always works better than fluent phrases.