Mood boards are powerful tools used in visual communication to convey ideas, themes, and emotions. They are collages of images, colors, textures, and typography that help designers and clients visualize the overall look and feel of a project. Mood boards can inspire creativity, spark new ideas, and facilitate communication between designers and stakeholders. By creating mood boards, designers can explore different visual directions, experiment with various design elements, and gather feedback from clients before moving forward with the project. Overall, mood boards are essential for setting the tone and style of a design project, as they provide a visual reference point for everyone involved in the creative process.