The Propel AWS S3 Data Source is a new feature that enables users to power their customer-facing analytics from Parquet files in an S3 bucket, simplifying data architecture by leveraging existing data. The source supports the Parquet file format and can be used in various scenarios such as event-driven analytics, data lake or lakehouse analytics, streaming analytics, and Airbyte or Fivetran integrations. The integration with an S3 bucket allows users to access their data without moving it around, and Propel automatically detects new Parquet files and caches the data for querying via GraphQL API within a couple of minutes.