Make sure as you progress in the game you pick up everything you come across on the ground. Unlike other game where you are given a limited inventory in Grenshin Impact you are given 30,000 slots so being selective as to what you pick up is not a factor. The reason why it is important to not leave anything on the ground is that the low rarity weapons and items you pick up will be fed into higher rarity ones in order to further enhance them. Also keep an eye out for chests, there are over 1,000 of them scattered across the world and the rewards you receive from them are scaled to your Adventure Rank and World Level.
