The width of a space varies among different fonts and renderers. Most renderers introduce line breaks at this space when a line of text reaches the end of the available display width. The non-breaking space, ] [, is an alternative to the usual space that can be entered to prevent a line of text from being broken into two lines at its position, such as between a quantity and its units of measurement, e.g. 60 km / hr.
From the vaporwave subculture which uses full-width lettering to write words. This style produces what appears to be spaces between each letter, leading to vaporwave-related terms being spelled with spaces between each letter to replicate this style (for example, the spacing in "ｖａｐｏｒｗａｖｅ", in full-width, is replicated using spaces as "v a p o r w a v e").[1]
(typography)A narrow non-breaking space, used to space out the punctuation marks ?, !, « », :, ;, %, ‹ ›, € and other currency symbols, and between opening and closing –
In traditional French typography, the non-breaking space should be a narrow one, called a espace fine insécable in French; however, due to technological restraints, a normal non-breaking space is used in its place. Nonetheless, in everyday French, a normal space is often used instead.
In standard Quebec orthography, the non-breaking space should only be used before :, between « », before %, before currency symbols, and between opening and closing –.[1]
^ Office québécois de la langue française ((Can we date this quote?)) “Espacement avant et après les principaux signes de ponctuation et autres signes ou symboles”, in Banque de dépannage linguistique[1] (in French)
space (punctuation) on Wikipedia.Wikipedia 