Minions are out there and you need to find them. When you walk in a neighborhood, your smartphone will show you a Minion Egg, where a Minion is hideing. Go close to your Minion Egg and catch your Minion by dragging it to the treasure chest.
The faster you catch it the more you will receive in bonus!
There are Minions hidden over the whole world also just outside your door! So, catch them!