How do I redeem Bitcoin money?

Excuse me, could you please clarify something for me? I'm a bit confused about the process of redeeming Bitcoin money. I understand that Bitcoin is a decentralized digital currency, but how exactly do I go about turning it into cash or using it to make purchases? Is there a specific process or platform I need to use? Could you provide me with a step-by-step guide on how to redeem Bitcoin money effectively and securely? Thank you in advance for your help.