Deploying web applications can be streamlined and automated through a comprehensive CI/CD pipeline, as demonstrated in a tutorial for setting up a SolidStart app. This process uses CircleCI for build automation and Vercel for seamless hosting, while integrating with a Supabase database to manage data storage and retrieval. The tutorial guides users through creating a SolidStart application, establishing a leaderboard interface, and implementing player score functionalities with SolidJS components. It also covers the configuration of API endpoints for managing scores and the integration of environment variables for deployment. By automating these steps with CircleCI, developers can focus on coding rather than deployment, ensuring their applications are updated reliably and efficiently with every code push.