If you want to objects statistics like (No. of object, collections, datasize etc. Available) follow below the commands.
use database
db.stats(); <—————- Get the database level statistics
db.technology.stats(); <—————- Get the collection level statistics
db.runCommand( { collStats : “restaurant”, scale: 1024 } )
For more Detail about Stats:
Database Stats: Click Here
Collection Stats: Click Here
Index Stats: Click Here