There are 2 methods in MongoDB find.

1. find()
2. findOne()

1.  find()-

Select date in collection you used find().

Syntex-

db.collection.find({ <criteria> })

Example- Find all documents in the "users" collection where the age is 30

db.users.find({ age: 30 })

2. findOne()-

Get only one document, You can use the findOne() method.

Syntex-

db.collection.findOne({ <criteria> })