Chocolate is a delicate product sensitive to its environment, it has the particularity of absorbing odors (do not put it in the refrigerator next to a cheese platter...).
Keep it in a cool, dry place, away from light. Ideal storage temperature 17°C.
In case of high heat, you can put your chocolate in the refrigerator. Just make sure it's in airtight packaging so the chocolate doesn't absorb moisture. Take it out a few minutes before eating it.