In Excel 2013, you can create data models containing millions of rows, and then perform powerful data analysis against these models. Data models can be created with or without the PowerPivot add-in to support any number of Pivot Tables, Pivot Charts, and Power View visualizations in the same workbook.
The data models can contain a huge amount of data that can use up computer memory which in turn could affect other programs that use the same system resources. If you use any Office or Excel online cloud applications, files are limited to 10MB which can be reached very quickly.
There is a good article here to read at on Microsoft’s Office Support website that will explain what you can do in detail.
You could also download and run Microsoft’s Workbook Size Optimizer. It analyses your Excel workbook and if possible, compresses it further.