This application uses Node.js for its server framework.
This application uses angular.js for client side scripting
This application uses mongoDB as its database
It was easy to create a mongodb instance on local system and query mongodb with easy functions and connecting mongo with node using mongoose.
Creating an instance of mLab and how to connect it with my app , options were confusing in first but I got the way to connect mLab witha app, connecting mLab with mongo shell and uploading the data on server.Sometimes the code was working on heroku and sometimes it was giving error due to internet connection.
Proper Connectivity of heroku with mLab. Bofore using it profesionally i would try to learn how to use angular and mongoose in a better way n have greater knowledge of MEAn Stack.