ERC-721A, introduced by Chiru Labs, is a more gas-efficient standard for batch minting in the world of NFTs.Unlike ERC-721, ERC-721A optimizes the minting process by using a sequential storage mechanism, resulting in significant gas savings.ERC-721A achieves efficiency through sequential ownership tracking and reduced gas overhead, making it suitable for projects minting NFTs in bulk.The benefits of using ERC-721A include lower gas costs, improved scalability, and a more user-friendly experience for NFT creators and buyers.