This template leaves leading space before the apostrophe, unlike the similar{{`}} (no spacing). This template is intended for use withitalic text, whereas{{`}} is intended for use with non-italic text. For example:
The ''Iliad''{{'}}s vocabulary is archaic.
generates:
TheIliad's vocabulary is archaic.
with a tiny amount of space before the apostrophe to avoid colliding with the italicd at the end ofIliad.
This template is also similar to{{-'}}, used to slightly space apart a leading single quote from a surrounding double quotation mark provided by a template parameter in which the content is placed, e.g. the|title= parameter of{{cite web}}. The equivalent template when manually placing double quotes around a single-quoted passage is{{" '}}; see also{{'-}} and{{' "}} for the right-hand side equivalents (parameter and manual, respectively). All of these templates use 0.2 em of spacing, while this template,{{'}}, uses only 0.1 em of spacing, as does{{'s}}, which is used for possessives in italics.