Apple has determined that a very small percentage of 13-inch MacBook Pro displays may exhibit one or more of the following behaviors:

Display backlight continuously or intermittently shows vertical bright areas along the entire bottom of the screen
Display backlight stops working completely

Affected devices were sold between October 2016 and February 2018.

MacBook Pro (13-­inch, 2016, Four Thunderbolt 3 Ports)
MacBook Pro (13-­inch, 2016, Two Thunderbolt 3 Ports)