There are alot of documnents and there is an entry of Age, soo we want to format the document in assending order of their age!
college> db.teachers.find().sort({age:1})
descending:
college> db.teachers.find().sort({age:-1})
lets say 2 people alicia and kelly have same age, soo then we want to sort by their name, A comes first than K..
college> db.teachers.find().sort({age:1, name: 1})