Always install the latest, stable version of MongoDB. See MongoDB Versioning for more information.
See the following release notes for an account of the changes in major versions. Release notes also include instructions for upgrade.
MongoDB 6.0 binaries are currently available only as release candidates. Release candidates can be used for early testing of new features, but are not suitable for production deployments.
This version of the manual is for an upcoming release and is currently a work in progress.
See also: MongoDB Versioning