How to Package after I Packaged out my Game and How to send to a Friend?

I have finished my game and i wanna send it to a few friends for some testing and feedback but how do i do that? do i just send them the Windows no Editor Folder the Unreal Engine makes for you? or do i put it into some kind of Installer?
Also when you are ready to upload to steam, do they provide there own installer that you add your game too? or do you have to provide one?

If a installer is required, does anyone know of some i can use and are easy to work with?

Yes, just send him the Windows No Editor folder and that is it. You can rename that folder if you want to.
I am not sure about your second question related to Steam.

You don’t need a seperate Installer, just select in the options that you want the pre-requisites included.

Under Project Settings, Packaging check Include Prerequisites.

Ok… but what if the player wants to delete the game? do they just drag to folder to the bin?