MongoDB 4.2 is now available on the Atlas free tier, allowing users to evaluate the latest version for free with fully-managed operations. The free tier provides access to various features such as Client-side Field Level Encryption, on-demand materialized views, wildcard indexes, and enhancements to the MongoDB Query Language. Users can provision a cluster in 19 regions across AWS, Azure, or Google Cloud and take advantage of up to 512MB of storage. Distributed Transactions are not available in the free tier, but all ACID transaction semantics for replica sets are available. To get started, users can follow the documentation's instructions on creating an Atlas free tier cluster, loading sample datasets, and registering for a free online course on MongoDB 4.2.