This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+25D8 forms with similar adjacent characters prevents a line break inside it.
The CLDR project calls this character “inverse bullet” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: bullet, inverse.
The Wikipedia has the following information about this codepoint:
In typography, a bullet or bullet point, •, is a typographical symbol or glyph used to introduce items in a list. For example:
•Item 1
•Item 2
•Item 3
The bullet symbol may take any of a variety of shapes, such as circular, square, diamond or arrow. Typical word processor software offers a wide selection of shapes and colors. Several regular symbols, such as * (asterisk), - (hyphen), . (period), and even o (lowercase Latin letter O), are conventionally used in ASCII-only text or other environments where bullet characters are not available. Historically, the index symbol ☞ (representing a hand with a pointing index finger) was popular for similar uses.
Lists made with bullets are called bulleted lists. The HTML element name for a bulleted list is "unordered list", because the list items are not arranged in numerical order (as they would be in a numbered list).
Representations
System
Representation (click value to copy)
Nº
9688
UTF-8
E2 97 98
UTF-16
25 D8
UTF-32
00 00 25 D8
URL-Quoted
%E2%97%98
HTML hex reference
◘
Wrong windows-1252 Mojibake
â—˜
Encoding: GB18030 (hex bytes)
81 37 9F 31
LATEX
\Elzrvbull
Adobe Glyph List
bulletinverse
Adobe Glyph List
invbullet
digraph
Sn
RFC 5137
\u'25D8'
Bash and Zsh inside echo -e
\u25D8
C and C++
\u25D8
C#
\u25D8
CSS
\0025D8
Excel
=UNICHAR(9688)
Go
\u25D8
JavaScript
\u25D8
Modern JavaScript since ES6
\u{25d8}
JSON
\u25D8
Java
\u25D8
Lua
\u{25D8}
Matlab
char(9688)
Perl
"\x{25D8}"
PHP
\u{25d8}
PostgreSQL
U&'\25D8'
PowerShell
`u{25D8}
Python
\u25D8
Ruby
\u{25d8}
Rust
\u{25d8}
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