Keywords are special words used as identifiers by a language. They are reserved words accepted by a compiler or interpreter, and thus should not (or cannot) be used as a variable or function name.

Keywords are special words used as identifiers by a language. They are reserved words accepted by a compiler or interpreter, and thus can't be used as a variable or function name. memory, for example, is a keyword in Solidity, so declaring a variable named memory is likely to raise fatal errors.

The term Keyword is also used as a synonym for "search term". For that meaning, you should use a different tag such as search-engine.