Why is POST suitable for authorization, and why is GET not suitable?

POST is suitable for authorization because it sends data in the request body, which allows sensitive information (such as passwords) to be hidden from the URL and browser history. GET requests pass parameters in the URL, which is unsafe for transmitting passwords, as the URL can be stored in logs, browser history, and be visible in the address bar. Additionally, POST requests are not cached or indexed by search engines, which enhances security when transmitting authorization data.