Introduction If you’ve ever packed a backpack for a long trip, you know that just throwing everything into one giant pocket makes a total mess. When you urgently need your passport, you have to dig past tangled headphones, loose change, and extra clothes. Power BI is no different. If you dump all your data into one big, messy spreadsheet, your reports will break and run painfully slow. Mastering Power BI is simply the art of packing your data into the right compartments so that finding answe...