DeFi stands for "decentralized finance". This is an umbrella term that encompasses everything related to financial ventures within the crypto space - at least those of the decentralized kind. DeFi news will often feature updates on new projects, roadmap changes, specific time period reports, and so on.
An increasingly more-popular opinion within the market is that DeFi will one day replace the traditional financial system, or at least complement it with all of the innovations happening within the sector. While ideas like these are controversial, there's no denying that the DeFi sector is continuously receiving huge interest from both enthusiasts, as well as mainstream investors, too - this is evident by looking at any pieces of cryptocurrency news.
In regards to crypto news, there seem to be major DeFi updates happening every single day. Stay in the loop, and don't miss out on the most important DeFi news!