hyphens

Use hyphens (-) instead of underscores (_) in URLs

When you use underscores (_) in your page URLs then Google will read it as one single word. for example, if we take this keyword “web design in UK”. Then Google crawler will see it as one single word which is “web_design_in_UK”.

So the best practice here is to use hyphens (-) which will basically separate all the keywords. Which makes it easy for Google crawlers to read it.