This question has probably been asked before but here it goes anyways. I have always used this format, domain.com/it-is-here.html Just wondering if doing it this way makes any difference, domain.com/it_is_here.html I tried it out and google seemed to index some of the pages within a week. Do you think it would hurt my rankings or increase them or does it really matter?
The differences is probably neglible, but changing it continously will hurt your rankings unless you are using a 301 rediret on the old links since google wiill now see dead pages or duplicate content on your site.