How do you feel about a URL like example.com/mfGGxbbFtgj01? Doesn’t look very trustworthy, does it? Am I correct in assuming you’d rather not click on it?
Thing is, Google doesn’t punish sites for having such URLs. However, users clearly don’t like them, which directly affects user experience. And if users are avoiding a page in search results, Google decides they don’t like the page itself rather than its URL and deranks it anyway.
Solution: put actual words in your site pages’ URLs. Not only it makes them more clickable, it’s also an opportunity for keyword optimisation.
The Search Engines, most notably Google, are continuously changing and updating how they rank for search results. To ensure your website remains successful within the search engines, you need time, expertise and energy to focus on recognising these changes.