Hosting an app on the Google Play Store involves a series of steps that begin with creating a Google Play developer account. Developers then need to prepare their app for submission by making sure it meets all the technical and design requirements set by Google. This includes providing app metadata such as the app name, description, screenshots, and keywords, as well as creating an app icon and feature graphic. The app is then submitted to Google for review, where it is checked for compliance with Google's policies and guidelines. Once approved, the app is published on the Google Play Store, where it can be accessed and downloaded by Android users worldwide. Google also provides tools and resources to help developers optimize their app's performance and visibility on the store.