The Totem Pole
From Miners Settlement - Game Wiki
Totem Pole: Bring your crafted enchant stones here with a pink or green potion to place a permanent mining click on a specific mining animal. You can purchase schematics for the enchant stones at the airport, you can get them filled there as well from the free schematics and the daily chests.
To use: There are two spots that you will drag your items towards. One will say Stone and the other will say Booster. Just below that you will see all of the stones and boosters that you have crafted. Touch the stone and drag it over to the empty space marked stone. Conversely, do the same for the booster. You will have a higher chance of success if you select the green potion as your booster. You will have an opportunity to watch an ad to increase your chance of success by 25%, if you have the VIP this will be free. Once the ad is over, or you've clicked the free VIP button, a little progression bar will appear. After a brief moment it will tell you whether or not you've had a success or a failure. Success will give you a 5% permanent boost for the mining animal stone that you selected. These are one-time-use only, whether you succeed or fail.