as google says here: https://support.google.com/webmasters/answer/76329

"Consider using punctuation in your URLs. The URL http://www.example.com/green-dress.html is much more useful to us than http://www.example.com/greendress.html . We recommend that you use hyphens (-) instead of underscores (_) in your URLs."

how do I change this in webfairy, I wish to use "-" instead of "_" in urls as google recommends. please advice.