This is the spaced en dash template; it renders like this (without the quote marks): " – "
It works similarly to the HTML markup sequence – i.e. a non-breaking space (which will not line-break and will not collapse together with normal spaces that come before the template), a short dash (known as an en dash), and a normal space (which will line-break and will collapse together with normal spaces that come after the template).
Among other uses, this template may be used in lists to provide something stronger than a bold middot "·" or a bullet "•", but shorter than an em dash "—". For horizontal lists, use {{flatlist}} or {{Hlist}} instead (see WP:HLIST). Here, the recommended usage is to use no space before the template and one space after the template, like this: