A checkmark can be easily inserted into Excel, Outlook, Word, and PowerPoint. A checkmark/tick mark is a special symbol or character that can be added in a spreadsheet cell to indicate that is ‘correct’ or ‘yes’ or while ‘x’ mark usually indicates ‘no’ or ‘incorrect’.Ī Checkmark (also known as a check symbol) is mostly used for confirming tasks, managing lists, and for different purposes.