This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has a Narrow East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. The glyph can, under circumstances, be confused with 14 other glyphs. In text U+003D behaves as Alphabetic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.
The CLDR project labels this character “equal” for use in screen reading software. It assigns additional tags, 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.