Developing Twitter applications can provide several benefits: 1. It allows you to promote your core services and products to your existing audience on Twitter. 2. It helps you stay connected with your clients. 3. It can attract new clients within your niche on Twitter. 4. Developing successful Twitter applications could result in being acquired by Twitter. 5. Applications can be monetized directly and generate revenue. 6. Twitter provides a powerful viral marketing environment where applications can spread quickly.