Will URLs with spaces in the path work on all major browsers? Will a path to content such as example.com/content type/page name work? or must it have a filler such as dashes -  example.com/content-type/page-name?
Spaces should be at least encoded as %20 .

It's not a good practice, not a standard, to use spaces in URLs at all. In my opinion it is better to replace all spaces with dashes or to concatenate them.

Spaces will cause problems with links, for example you might get:


www.example.com/problem with link


instead of:


www.example.com/problem with link