Bill Jelen, better known to millions as "MrExcel," didn't just teach people how to use Excel; he fostered a community. Through his website, his famous "Learn Excel from MrExcel" podcast, and his tireless convention tours, Jelen became the bridge between the cryptic technical manuals of Microsoft and the frantic needs of the everyday office worker.
He turned a tedious, manual data-cleaning process into a trivial button click. It is a small part of the larger BI picture, but it perfectly encapsulates his philosophy: bill jelen power pivot and power bi