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The change-log suggests that the update adds enhancements to reduce the electrical consumption during power off charging.
It is also likely that Samsung would use this opportunity to fix the Exploit on their Exynos processors. The Samsung Exynos 4210 chipset in the device allows a malicious app to be installed allowing an unknown person to remotely wipe your data and leave your tablet bricked.
You can download the update to your device when you receive a notification or manually check for the update by heading over to Settings on your device.
source – Verizon