Here's why you should upgrade to Office 2021 if you're on 2019 or 2016 (and for some reason you can't upgrade to 365). You get life-changing Excel functions like XLOOKUP, UNIQUE, FILTER, SORT and a lot more. I cover what you get when you upgrade in this post.
This tutorial shows you different methods to generate random numbers in Excel (including no repeats). You might need random numbers if you're preparing test data. Or if you need to share your files with consultants and have to replace official values with random ones.