While creating a schema in MongoDB, what are the points need to be taken into consideration?

While creating a schema in MongoDB, the points need to be taken care of are as follows:

• Design our schema according to the user requirements
• Combine objects into one document if we want to use them together; otherwise, separate them
• Do joins while on write, and not when it is on read
• For most frequent use cases, optimize the schema
• Do complex aggregation in the schema