In the previous lesson, we learned basic ways to update documents in Mongoose. In this lesson, we will learn about how we can use operators that can be used to update documents in Mongoose. Much like in when finding documents , we can use operators to update documents in Mongoose, too! ## Special types of Updates Operators are used to perform special types of updates on a document. In the previous lesson, you may have noticed that all of our updates were essentially overwriting values in the document. This is fine for simple updates, but what if we want to perform more complex updates?