Why is this important?
- Because it seems that everyone uses MS Word these days. There are other word processors (and spreadsheets, and presentation software), but Microsoft is working hard to kill the viability of anything and everything else. When you send out resumes, or turn in homework assignments, most folks will ask you to send in Word format.
- It's expensive to buy. Word alone costs ~$110. There are gazillion options to "subscribe" on a yearly basis (so you don't have to purchase updates, but they hit up your credit card every year). Home, personal, university, student... starting at $70 and up each year.
But if you can live with those limitations (must have wifi, terms could change), then you can use Word, Excel, PowerPoint and other software for free, and you can store documents in a generously-allotted cloud storage repository, OneCloud.
Start here: https://office.com/