$in

The $in operator in MongoDB selects documents where a field value matches any value in a specified array. It provides efficient multiple value matching without using multiple $or conditions. $in supports all BSON data types and is particularly useful for filtering by lists of IDs, categories, or enumerated values, offering better performance than equivalent $or queries.

Visit the following resources to learn more:

• @official@Aggregation Operators
• @official@$in