Aggregation in MongoDB is basically an operation that is used to process a set of data that is gathered from multiple documents, and operate on them in various ways, to return a single combined data. It basically groups together data from multiple sources (documents) and then operate on it in various ways, to return a single combined value.
Planning to learn MongoDB and getting certified? Then check out the MongoDB certification course, from Intellipaat. Also, have a look at the following YouTube video on MongoDB Tutorial to get on-track.
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