This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. Its East Asian Width is narrow. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+003D forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with 14 other glyphs.
The CLDR project calls this character “equal” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: equals.
The Wikipedia has the following information about this codepoint:
The equals sign (British English) or equal sign (American English), also known as the equality sign, is the mathematical symbol =, which is used to indicate equality in some well-defined sense. In an equation, it is placed between two expressions that have the same value, or for which one studies the conditions under which they have the same value.
In Unicode and ASCII, it has the code point U+003D. It was invented in 1557 by Robert Recorde.