Is Exchange the same as Gmail?

Excuse me, but could you please clarify something for me? I've come across a question that's been bugging me for a while, and I'm hoping you can shed some light on it. Is an "Exchange" in the context of cryptocurrency and finance the same thing as Gmail, the popular email service? I understand that both involve some form of digital platform, but I'm not sure if they serve the same purpose or function in similar ways. Could you explain the key differences between the two, and help me understand why they are not interchangeable? Thank you in advance for your assistance.