Assume Nothing!
If you are not on the app dont expect the browser to save your work!
I assumed my work was being saved, and I deleted my tab for my chart, and it was NOT there when I went back looking for it. The only reason I was able to attain this diagram is that I saved it by chance in my OneDrive "CSIT Folder" before deleting the tab.
Ask yourself, where is my work being saved, and where will I find it? Play around with the source and test it out before you delete any tabs. Don't assume that the browser or the computer can read your mind.
PowerPoint
There have been times I want to work with people on assignments or projects from home, so having the ability to present with teams is VERY helpful.
Presenter view is something I didn't know existed, but I appreciate it now because it helps me explain my thoughts efficiently and clearly.
Word
I cannot tell you how many essays I have written that require anotated bibliogrophys. It would have been nice to know there was a built-in system that helps you create them without having to use suspicious websites.