U+2139 "ℹ" Information Source Unicode Character

U+2139 "ℹ" Information Source is a distinctive symbol typically rendered as a lowercase letter "i" enclosed within a circle, designed to indicate that additional information or context is available about a given topic. It is often used in user interfaces, signage, and documentation to direct users to a source of details, such as a help page or explanatory note, and is classified under the letterlike symbols block within the Unicode standard. Unlike its plain Latin counterpart, this character is intended as a standalone pictographic glyph rather than a typographic letter, and it carries a semantic function similar to a question mark or exclamation point for triggering informational queries.