Place Ability is a gamepass, having this gamepass will allow you to place blocks (depending on inventory). It was used to build with dirt, stones, etc.
It will be released to the public soon, as this gives you early access and maybe max upgrade.
The gamepass started out as R$ 714, then 614, and is currently 814.
Because of the winter challenge, Turquoises cannot be selected while using Place Ability until January 9th, 2015 by an update made by Dummiez.
For another unknown reason, Place Ability doesn't work on mobile devices and will be working for them in the meantime.