MongoDB Atlas has introduced a new feature called "Load Sample Data" that allows users to quickly load six pre-existing datasets into their database instance, ready for exploration and practice. This feature is designed to help developers learn MongoDB faster by providing access to 350MB of sample data, including collections on topics such as AirBnB reviews, shipwrecks, movies, office supplies, training data, and weather reports. The sample data is pre-indexed and can be used with various tools like MongoDB Charts or Compass for data visualization and analysis. This feature aims to simplify the learning experience for MongoDB users, especially those on the free tier, by providing a set of pre-loaded datasets and tutorials to get started with.