Connected to Cluster-0 but not to Sandbox

In the lecture, Mongodb Atlas screen shows Sandbox and underneath shows Sandbox, but in the same screen for me I see Sandbox and Cluster-0 underneath. Why? This is probably the reason that I do not have a script with Sandbox in it.

Please help

Not able to understand what is the query here.

If you are working on two projects in Atlas and you are seeing “Cluster-0” in one and “Sandbox” in another, share the connection string for both here. [ Connect -> connect from Mongo Shell ]

In the screenshot you have provided, “Cluster-0” is the replica set name and will be used in connecting to the Mongo shell.