When you create a new topic, WordPress automatically sets the slug, but it is not recommended to use it like that. The default slug may not be friendly for both search engines and your site visitors.
Below are some of the tips to create user friendly and SEO friendly permalinks:
Target your SEO keywords in URL
Put it simple and descriptive
Don’t use dates and year in the URL
Use “-” (dash) between the words in URL instead of “_” (hyphen)