Primer paint is a special type of paint used as a base coat before applying the final layer of paint. It helps improve adhesion, ensuring that the topcoat sticks better to the surface. Primer is especially useful on new surfaces, such as drywall or wood, and can also help cover stains or previous colors. Using primer can enhance the durability and appearance of the final paint job. It can also help to block out imperfections and create a more uniform finish. Different types of primer are available, including oil-based and water-based, each suited for specific surfaces and conditions.