Baseboards and trim are installed to create a clean, polished look and protect walls from impact. The process involves measuring and cutting materials to fit corners and edges, followed by nailing or gluing them into place. Sealing joints and painting or finishing ensures durability and a seamless appearance. Well-installed baseboards and trim not only define the room aesthetically but also cover gaps between walls and flooring, providing a finished and cohesive look to any renovation project. Accuracy and careful fitting are key to achieving a professional result.