Why is it preferable to use MongoDB instead of traditional relational databases when developing certain applications?

MongoDB is preferable to use instead of relational databases in the following cases:

• Flexible data schema: MongoDB is a document-oriented database where the structure of documents can change, which is convenient for applications with dynamic or frequently changing data.
• Scalability: MongoDB scales well horizontally (sharding), which is important for large volumes of data and high loads.
• High performance when working with large volumes of unstructured data: thanks to storing data in BSON format and the absence of complex JOINs.
• Rapid development: the lack of need to design a complex schema in advance allows for faster prototyping.

Example: if an application stores data with different structures (for example, user profiles with different sets of fields), MongoDB will easily implement this without schema migrations, unlike relational databases.