Dash vs Underscore in URLs which is better? For website Ranking ?

Dash vs Underscore in URLs which is better? For website Ranking ?

In URL structure, hyphens(-) rather than underscores(_) makes much easier for search engine to know about your page. Google read a hyphen as a word separator but does not treat an underscore that way. If your url is http://www.example.com/on_page_tips then Google read it same as /onpagetips.