Account abstraction is a concept in blockchain technology that separates the execution of smart contracts from the management of the user's account balance. With account abstraction, developers can design and execute smart contracts without worrying about the underlying account balance, enabling greater flexibility in designing decentralized applications. In traditional blockchain systems, smart contract execution and account balance management are tightly coupled, limiting the capabilities of developers. With account abstraction, developers can build more complex and powerful decentralized applications on top of the blockchain.