What is a stock exchange floor?

Could you elaborate on the concept of a stock exchange floor? Is it a physical location where traders gather to buy and sell stocks, or has it evolved to become more digitalized? If it's a physical space, what kind of activities take place there, and what's the significance of having a dedicated area for stock trading? Are there any regulations or protocols that traders must adhere to while operating on the floor? Additionally, how has the rise of electronic trading impacted the role and relevance of traditional stock exchange floors?