When you create a database in MongoDB, your database is basically an empty container for which you can add one or more collections to.
A collection is analogous to a table in relational databases.
In relational databases, you can use CREATE TABLE to create each table that you want in the database.
But MongoDB is not a relational database, and it stores its data as documents. Each document is stored in a collection.
This article shows you how to create a collection in MongoDB.