How can I effectively use mulch in raised beds to improve soil quality and retain moisture for my plants?

To effectively use mulch in raised beds, spread a layer of organic mulch like straw or wood chips on top of the soil. This will help improve soil quality by adding nutrients as it breaks down. The mulch also helps retain moisture by reducing evaporation, keeping the soil moist for your plants. Be sure to replenish the mulch as needed to maintain its benefits.