Modeling in Power BI is easy. There is really only three main things you need to know to get started :
There is also plenty more you can do with modeling. DAX (Data Analysis Expressions) is a high level language similar to excel where users can enter in specific calculations to a formula bar. With DAX there are many date and time intelligence functions that can be used to help create powerful and automated reports.
This section is meant as a guide to started with some power modeling features in Power BI. The best way to learn is by applying these concepts right away to your data set in Power BI. You can download the candy store data excel file to follow along.