Incognito is also great if you need to log in to something on someone else’s machine, or someone needs to log into something on your machine. As soon as the window closes you’re logged out.
For example, I’ve used this to great effect in the past helping people find their cell phones. I open an incognito window, let them log into their Google or Apple account, then use the respective find phone tool.



No joke, when we do interviews we have candidates give code review feedback. One of the pieces of code is a poorly written but functional “find the unique numbers” function. We have had ONE candidate say, “Just throw them in a set.” And in our separate chat where we discuss candidates, we were like, “Finally someone gave the right answer.”
(Not that there’s a wrong answer when code reviewing like this, but I was waiting for someone to come to that solution.)