Through NFT Level Up, you can increase EXP that can affect the NFT's mining efficiency. The increased EXP may differ for each collection, and in the case of Marblerships, you can increase the volume of stored MBX tokens in your NFTs by leveling up.
Level up become available once the Token ID has met the level up requirements.
By claiming all staking Rewards, an NFT's EXP will also increase. Once the EXP reaches 100%, the NFT can be leveled up.
NFT's can only be leveled up one at a time.