The front door for external users
If you are an experienced user of 365, you may think that Forms is unnecessary, especially if you use Power Apps. You can build list forms with SharePoint lists, and if you need more advanced customizations, you can use Power Apps along with them. SharePoint has been increasingly enhanced with list functions that allow you to have a form with rules and easy-to-fill-in visuals, and Power Apps can build all kinds of tools for your company, including a collection of responses. One feature they all have in common is user authentication!
To use both tools, you need to be logged in to 365, and this implies that, in addition to being part of the organization, you have a 365 license and permissions on the site where this list or app lives. With Microsoft Forms, this scenario is different; it is the only response collection tool in 365 that allows anyone to answer surveys.
By simply clicking on the Share option and selecting Anyone can respond, you will...