$search stage is not available in this "The MongoDB Aggregation Framework" course

I searched in mongodb document and found that there is a $search stage being used at a lot of places in the aggregation framework, but its not present in this “"The MongoDB Aggregation Framework” course.
I am curious to know, if its been left knowingly or its not related to aggregation framework?

Hi @Harpal_Singh,

Welcome to the MongoDB University forums :sparkles:

The $search is a pipeline stage in the MongoDB Aggregation pipeline that performs a full-text search of an Atlas collection’s field(s). The fields must be covered by an Atlas Search index. Our curriculum team is developing the university lesson for Atlas Search.

Let us know if you have any further questions.