Deadline extension for submission or completion

Helllppppp
Tue, 01 Dec 2015 00:54:42 +0000

So this message came up on my review page: If you started your application prior to 11:59pm PST, November 30, you will have until 11:59pm PST on December 1 to complete the submission of your application for fall 2016 admissions.
Is this for people who got stuck with the ‘submission’ part due to the site being too slow, or can people use the extra day to review their applications?
**I finished my application a few weeks ago, but a lot of students at my school have been asking the same question on social media.