Payment systems include electronic payment methods that allow individuals and businesses to make and receive payments online or through other medium. These systems can be traditional, such as credit card processing and bank transfers, or decentralized, as seen in cryptocurrencies and blockchain technology. They often consist of payment gateways, processors, and digital wallets, which together define how money is transmitted, received, and recorded across networks. In the context of web3, payment systems leverage blockchain technology to ensure secure, peer-to-peer transactions without intermediaries, thereby enhancing transparency and reducing costs.