NFT minting on Ethereum can be expensive due to the high gas fees associated with executing intelligent contract transactions on the blockchain. Previously we learned how to use the ERC-721 standard, but there is an improved standard, ERC-721A, by Azuki. It gives enormous gas savings when minting multiple NFTs in one transaction. Minting five NFTs can save 7.2 times gas compared to the original ERC-721 standard. Let's check it out in this article.