Another major area that is resource-intensive is the database layer. We need a readily available server with enough storage space.

The Firebase Realtime database gives us a convenient way to access and store our data. It is a JSON storage engine, which means that it is schemaless. One of the most compelling features of the Realtime Database is that it gives us the ability to listen to and act on changes to our data. Essentially, this can completely replace the APIs that we previously created to fetch our data.