You need to look for certain materials to enhance the level of your equipment. But don't worry! There's no need to run around the maps or fight random Behemoths to gather these materials.
Simply follow these steps and you'll complete the materials you need to enhance your equipment in no time:
1. Tap the circle icon on the bottom right part of your screen.
2. Tap "Armory".
3. Select and tap the weapon or armor that you want to enhance or tap "Forge".
4. If you've selected an equipment icon, Tap "Enhance". If you've selected "Forge," tap "Equipment". 
5. On the next screen, you'll see the materials to enhance your selected equipment. Tap the material that you need.
6. You'll see a list of possible locations and monsters that drop the materials you need. Select any area from the list and then confirm.