We’ll begin by taking a look at the structure of MongoDB to help us to understand what the MongoDB Create Index function is used for and why it is so important for working with the Database Management System. The NoSQL solution does not rely on tables, like relational systems such as MySQL, relying on documents stored in collections instead. These do not have to follow a schema, rather they are scalable and very flexible. This allows huge databases and collections to be created and documents to be inserted. You’ll need some kind of order find certain data or data sets, and this is achieved with indexes.
An index improves order in a database and makes it easier for the system to process search queries. Without this, searching a huge collection with thousands of documents is time consuming and frustrating. Equipping the documents with indexes means they will be well-organized and easier to locate. The search is more efficient as only a part of the documents has to be read. You can use the MongoDB command Create Index to do this.