Use this tag for questions related to a Unicode String, such as UTF-8.
Quoting this answer:
Unicode is a standard for working with a wide range of characters. Each symbol has a codepoint (a number), and these codepoints can be encoded (converted to a sequence of bytes) using a variety of encodings.
Notice that unicode-string can be used with any programming environment that uses Unicode Strings. You ought to tag the question with the tag of your programming environment as well though.
