Deployment to static hosting for a Vue app involves writing the app code, then running the build command 'npm run build' which generates a dist/ folder containing static files like index.html, JavaScript, and CSS. These static files are then uploaded to a static hosting service. When a user visits the app URL, the browser requests and loads these static files, running the Vue app entirely in the browser. This process does not require a backend server because the app is fully static after build. Key steps include building the app to generate static files and uploading those files to the hosting server. Without uploading the dist/ folder, the app will not load. This flow ensures the Vue app is accessible and runs smoothly for users.