I'm new to the world of cryptocurrencies

DeFi stands for "decentralized finance" and it is one of the hottest topics in the world of cryptocurrencies. The basic idea behind DeFi is to create financial services that don't depend on traditional banks and financial institutions. They run on blockchain and users can engage in various financial transactions such as borrowing, lending, exchanging and more, directly using their cryptocurrency assets. To get started, I recommend visiting the Romtos website what is defi in cryptocurrency. There are some great articles and tutorials about DeFi there, including basic concepts and use cases. It's a good way to get started.