Update documents into MongoDB collection you can use  two methods in the MongoDB shell or in your application.

1. updateOne()
2. updateMany()  

1. updateOne()-

You used updateOne() to update a single document into a collection.

db.collection.updateOne(
   { <filter> },
   { $set: { <update> } }
)

filter - Filter criteria to match documents

update - Update operation

Example:

db.users.updateOne(
   { name: "Mahendra Pratap Singh" },
   { $set: { age: 31 } }
)

Update the age of a user named "Mahendra Pratap Singh" to 31:

2. updateMany()-

db.users.updateMany(
   { age: { $gt: 25 } },
   { $set: { status: "active" } }
)

MongoDB provides various update operators like $set, $unset, $inc, $push, etc., to perform specific update operations.