Why is just an ID in the URL path a bad idea for SEO?

Question

Why is it a bad idea to have a ID in the URL in terms of SEO? How does this URL http://example.com/user/1234 hurt SEO?

Can someone give me a practical e

Answer 1

It simple, search engines care words rather than number. That is to say, it will be better to see keywords in url than just ID sine ID/number is useless for search engines to determine whether your site is relevant or not!