Spell checking is a process used to identify and correct spelling errors in written text. It typically involves software tools that scan documents for words that do not match a predefined dictionary. When a misspelled word is found, the spell checker may suggest alternatives or allow the user to ignore the error. Most modern word processors, like Microsoft Word and Google Docs, come with built-in spell checkers. These tools can also highlight grammatical mistakes and offer suggestions for improvement. Spell checking helps ensure that written communication is clear and professional, reducing misunderstandings caused by typos.