mongodb update insert more data into a document code example

Example 1: mongodb insert

db.products.insert( { item: "card", qty: 15 } )

Example 2: mongodb update

db.collectionName.update({"aField":"vale1"},{$set:{"anotherField":"value2"}})

-search for documentations for more examples than search
-aField is used to find the documents
-anotherField is the field that will be updated
-You can also use the below:
-- updateOne
-- findOneAndUpdate