This is the point in your game's development you've worked so hard for, submitting it to the Apple App Store. The good news is that most of the work has already been done! To submit your game for review, at this point, all you have to do is go to your app's Versions tab and click on the Submit For Review tab.

You can see this in the following Adventure app example image:

You will be asked a few questions before the actual submission, such as about Export Compliance, Content rights, and Advertising Identifier (IDFA) information. More information on IDFA can be found here:

https://developer.apple.com/library/ios/documentation/LanguagesUtilities/Conceptual/iTunesConnect_Guide/Chapters/SubmittingTheApp.html#//apple_ref/doc/uid/TP40011225-CH33-SW8

Now the waiting game begins with your game in the Waiting For Review status. Again, the wait time for app approval will vary but is usually much less than it used to be in the past. Hopefully, all goes well and you will see a green mark stating your game's submitted version number with the words Ready for Sale; as follows:

Congrats! Your game should be now located in the App Store for everyone with an iOS device to download and play! Make sure to check out the various analytics tools iTunes Connect provides to keep a pulse on your game.