A "styling update" refers to making changes or improvements to the appearance or design of something. It could involve modifying the visuals, aesthetics, or overall look to enhance its appeal. Full definition
The trucks get a relatively minor styling update for 2013 — headlights get the LED treatment and there are now four different grille options — but more important is the upgraded drivetrain. (autoweek.com)
Get an easy style update with a brand new shade. (lampsplus.com)
A facelift at the end of 2012 added some subtle styling updates including a new bumper and colours but you'd be hard pressed to tell the difference. (autoexpress.co.uk)