Once you have submitted your app for review, there is certain metadata which cannot be edited, such as keywords and the name of your app. However, some metadata can be edited at any time, such as screen shots, your marketing description, and your support URL. Review Appendix A and Appendix B of the iTunes Connect Developer Guide for complete details on when you can edit or update app metadata.
Version Release Control is a recently added feature in iTunes Connect that is presented when you submit updates for your apps currently on the App Store. This feature gives you the option to either automatically release an update once it’s approved by the App Review Team, or release it yourself through the Manage Your Applications module. If you select to release a version yourself, it will appear as Pending Developer Release once it has been approved and will remain in this state until you release it to the App Store. You will receive an email reminder to release a version of your app if it is in the Pending Developer Release state for longer than 30 days. For more details, read the Version Release Control section of the iTunes Connect Developer Guide .