"Decentralized finance" (abbreviated "DeFi") refers to the ecosystem of financial applications being built on top of blockchain technology. Decentralized financial innovation (DeFi) is a movement that supports the development of various financial services and products using decentralized networks and open-source software. The goal is to build and run financial DApps on top of open and untrustworthy infrastructure, such as permissionless blockchains and other peer-to-peer (P2P) protocols. The three primary duties of DeFi at this time are: establishing monetary banking services, such as stablecoin issuing offering platforms for peer-to-peer or pooled lending and borrowing enabling sophisticated financial tools like DEX, tokenization platforms, derivatives, and prediction markets There are various kinds of DeFi services available within those three categories. Funding protocols, software development tools, index creation, subscription payment methods, and data analysis software are a few further examples of products and use cases. DeFi dApps can be used for identity management services like KYC and AML as well. Comparing decentralized finance to conventional financial services reveals many advantages. Using distributed systems and smart contracts makes it much easier and safer to deploy financial applications and products. For instance, a large number of decentralized applications (dApps) are being created on top of the Ethereum blockchain, which offers cheaper entry costs and operations costs. In conclusion, the DeFi movement is moving traditional financial goods to the open source and decentralized world, eliminating the need for intermediaries, cutting costs overall, and significantly enhancing security.