This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as service sign.
The glyph is a square version of the glyph Katakana Letter Sa. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+1F202 offers a line break opportunity at its position, except in some numeric contexts.
The CLDR project calls this character “Japanese “service charge” button” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: “service charge”, Japanese, katakana, サ.
This character is designated as an emoji. It will be rendered as monochrome character on conforming platforms. To enable colorful emoji display, you can combine it with Variation Selector-16: 🈂️ See the Emojipedia for more details on this character’s emoji properties.
The Wikipedia has the following information about this codepoint:
Sa (hiragana: さ, katakana: サ) is one of the Japanese kana, which each represent one mora. Both represent [sa]. The shapes of these kana originate from 左 and 散, respectively.
Like き, the hiragana character may be written with or without linking the lower line to the rest of the character.
The character may be combined with a dakuten, changing it into ざ in hiragana, ザ in katakana, and za in Hepburn romanization. The pronunciation is also changed, to [za].