What do you need for DeX?

Could you please elaborate on the requirements necessary for utilizing a Decentralized Exchange, or DeX? Are there any specific tools, software, or cryptocurrencies that are essential for engaging in transactions on a DeX platform? Additionally, are there any security measures or best practices that users should be aware of when navigating the world of DeX? Understanding the prerequisites and considerations for DeX usage is crucial for those looking to explore this innovative financial technology.