What is the difference between a changeStream and tailable cursor in MongoDB

Question

I am trying to determine what the difference is between a changestream: https://docs.mongodb.com/manual/changeStreams https://docs.mongodb.com/manual/reference/method/db.collect

Answer 1

With tailable cursor, you follow ALL changes to all collections. With changeStream, you see only changes to the selected collection. Much less traffic and more reliable.