ViewModel is a view layer for Meteor. You can think of it as Angular, Knockout, Aurelia, Vue, etc. but without the boilerplate code required to make those work.
Here are some things it can do to make your life easier:
Go to viewmodel.org for examples and full documentation.
Go to the help section if you have any questions, comments, feedback, or just want to talk about anything related to ViewModel and Meteor.