Translations are used for three main purposes:
Multi-Language sites: Manually translate your website and provide static copy in more than one language. You can create a
ymlfile that maps the translation key to a value for each language, and then use the
translate) filter in Liquid to render the proper value, based on the current user’s language.
Date Format: Come up with a common format for a date, then use the
localize) filter to render date and time consistently across the platform. This is useful to be able to easily change the way date/time is displayed everywhere, or to customize on a per site basis.