I have a LOT of people in my organization using the app I've made, so it's getting to the point where rather than sharing with individuals, it may make more sense for me to share with everyone in my org. My only question is, does this option send an email notification to everyone in my org?
I ask because there are a lot of people who don't use it and would be very confused by an email notification about an app they've never heard of nor plan on using. I work for a very large company, so I just want to make sure I wouldn't be spamming thousands of people's inboxes if I went with this method.
When sharing an app, you can type "Everyone" in the prompt asking for a name or email address. This gives blanket permissions to the entire organization. You can choose whether or not to send an email invitation form the "Share" screen of your app.
Alternatively, you can set an AD group to have permission, which is more secure.
From there, it will give you a hyperlink to the app and you can send out your own email explaining what the app is for and how to access it. I usually include a link to PowerApps for Android and iOS as well.