How does fixed wifi work?

Could you please explain to me how exactly fixed wifi operates? I'm curious to know the underlying technology and how it differs from other forms of internet connectivity like mobile data or satellite internet. Is it more reliable? What are the benefits and drawbacks of using fixed wifi for home or business purposes? Additionally, what are the installation requirements, and how does it compare to traditional broadband services in terms of speed, cost, and coverage? Thank you for your insights.