Experimental Gameplay

Experimental Gameplay is a game option exclusive to Bedrock Edition. It allows the player to test some unfinished or work-in-progress features, but toggling it allows players to have an early look.

Toggling
Experimental Gameplay is found in the world options when creating a world. Turning the option on does not disable achievements, however it can't be redisabled when it is and the world is created. Enabling it on a already existing world makes a copy called "[EX] World Name". The original world without experimental gameplay can still be played, although progress does not transfer through the two worlds.

Features
The point of Experimental Gameplay is for the player to look at some not-quite-finished features. As of 1.14.1, turning it on gives the player access to:
 * Structure Block functionality
 * Structure Voids