How do Firestore and Firebase differ in terms of their functionality and usage?

Firebase is a platform from Google that provides a set of cloud services for developing mobile and web applications, including authentication, storage, analytics, and databases.

FireStore is one of the databases included in Firebase. It is a cloud NoSQL database that stores data in the form of documents and collections, supports real-time synchronization, and offline access.

Thus, FireStore is a specific database service within the Firebase ecosystem. Firebase includes FireStore as well as other services for application development.