In this chapter, you were hopefully able to better understand the read and write operations in MongoDB. Moreover, now, you should also understand why it is important that you already know the queries you need to execute even before the document modeling process. Finally, you learned how to use the MongoDB properties, such as atomicity, at the document level and saw how it can help us to produce better queries.

In the next chapter, you will see how a special data structure known as index can improve the execution of our queries.