"Go about" (or coming about/tacking) is the sailing maneuver of turning a boat's bow (front) through the wind, causing the wind to shift from one side of the boat to the other. This allows the vessel to change tack and sail at an angle to the wind, often used in a zig-zag pattern to move upwind.

Key Aspects of "Going About"
Purpose: To turn the sailboat to change its course relative to the wind (changing from starboard tack to port tack or vice versa).

The Maneuver: The boat is steered toward the wind, passes through the "eye of the wind," and the sails fill on the opposite side.

Procedure: It is a "head-to-wind" maneuver, as opposed to a jibing (gybing) maneuver where the stern (back) passes through the wind.
Terminology & Calls: Often referred to simply as "tacking" or "coming about." Common crew commands to initiate the move include "Ready about!" and "Hard a-lee!" or "Lee ho!".

Contrast with Jibing: While going about moves the bow through the wind, a jibe brings the stern through the wind.