When you are naming files, some people tend to use underscores instead of dashes. Something like this:
Wrong Way: http://www.domain.com/sub_folder/file_name.htmCorrect Way: http://www.domain.com/sub-folder/file-name.htm
Your media files would be an example of this as well. In any case, it’s best to keep it to dashes.
Why? Because Google looks at underscores as joiners. That means it looks at it as one word. And that sucks for the Google search engines.
Level 2 Team
When you are naming files, some people tend to use underscores instead of dashes. Something like this:
Wrong Way: http://www.domain.com/sub_folder/file_name.htm
Correct Way: http://www.domain.com/sub-folder/file-name.htm
Your media files would be an example of this as well. In any case, it’s best to keep it to dashes.
Why? Because Google looks at underscores as joiners. That means it looks at it as one word. And that sucks for the Google search engines.