Blockchain wallet development refers to creating software that enables users to securely store, manage, and transfer their cryptocurrencies and digital assets. Blockchain wallets can be either custodial, where the platform manages keys, or non-custodial, where users control their private keys. These wallets can support a variety of assets, including Bitcoin, Ethereum, and ERC-20 tokens, and typically offer features like multi-signature support, private key encryption, and backup recovery options. Blockchain wallet development enhances security and accessibility for users in the digital asset space.