A typo, short for typographical error, is a mistake made in printed or typed text. It often occurs when a person accidentally hits the wrong key on a keyboard or misprints a letter while writing. Typos can lead to misunderstandings or confusion, especially in important documents or communications. Common examples of typos include missing letters, repeated letters, or incorrect word usage. While they are usually minor errors, they can affect the clarity of the message. Tools like spell checkers and grammar checkers can help identify and correct typos before finalizing a document.