The answer to mulching bare spots is to assess the cause of the bare spots and apply a layer of mulch to help the area regrow. Common causes of bare spots include poor soil, excessive foot traffic, drought, or weed growth. Symptoms include patchy, thin grass or exposed soil.
For small, isolated bare spots, you can often address the issue yourself by raking the area, adding compost or topsoil, and applying a 2-4 inch layer of organic mulch like wood chips or shredded bark. This helps retain moisture, suppress weeds, and create an environment for grass to regrow. However, if the bare spots are widespread or the result of a larger issue like poor drainage or soil compaction, it's best to call a professional landscaper to diagnose and treat the underlying problem.