Mood boards are visual artifacts (posters, bulletin boards, screens, canvases, etc.) that include a variety of objects and images with the purpose of eliciting a certain mood or feel.
Mood boards are very useful for any type of design, especially web design. The designers can test out different image patterns, color schemes, and font styles while having a physical and editable prototype. Having a mood board allows the designer to be able to make quick and easy changes to their prototype and allows them to experiment with a variety of different visual layouts. Having access to endless customization allows the designer to ultimately find the best layout for their intended project.