When using MongoDB Compass, importing data from JSON and CSV files has been made easier and more powerful with the latest release. The new functionality allows for importing JSON arrays, which is a standard format for REST API responses, and provides more control over what fields are imported when using CSV files, including the ability to specify data types. Exporting data in Compass also becomes simpler, allowing users to save it as JSON or CSV with optional filtering by query. Additionally, Compass 1.21 includes under-the-hood improvements and bug fixes that enhance overall performance and security.