What is the best choice of URL structure?
Keep it short and simple. Good URLs are short and to the point. Make sure you aren't filling yours with any unnecessary words or characters, and avoid keyword stuffing. Having the same keyword in your URL more than once won't do you any good.
What is SEO friendly URL structure?
SEO friendly URLs are URLs that are designed to meet the needs of users and searchers. Specifically, URLs optimized for SEO tend to be short and keyword-rich.