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 standard dictionary. When a misspelled word is found, the spell checker may suggest alternatives or allow the user to ignore the error. Most word processing programs, like Microsoft Word or Google Docs, come with built-in spell checkers. These tools can help improve writing quality by catching mistakes before the text is published or shared. Additionally, many web browsers also include spell checking features to assist users while typing online.