MongoDB

Collections consist of one or many documents.
Instance: a single machine locally or in the cloud, running a certain software.

Atlas is
1. Your database in the cloud for this course and beyond
2. Database as a service
3. MongoDB is used at the core of Atlas for data storage and retrieval.

Instance: a single machine locally or in the cloud, running a certain software

Services

• Manage cluster creation
• Run and maintain database deployment
• Use cloud service provider of your choice
• Experiment with new tools and features

MongoDB Atlas
Clusters are groups of servers that store your data.
Replica Sets are a set of a few connected mongodb instances that store the same data.

How is MongoDB Atlas related to MongoDB the Database?
They both are MongoDB products.
Atlas has many tools and services within it that are built specifically for the MongoDB database.