Use Conditional Formatting in Excel Conditional Formatting is a tool that allows you to apply formats to a cell or range of cells, and have that formatting change depending on the value of the cell or the value of a formula. Step by step instructions & practice workbook Updated on April 11, 2018 Was this article helpful? Yes No Related Articles Computer Requirements for Online Courses How to Save a Google Doc as a Word File How to Install Office 365 on a PC How to Install Office 365 on a Mac Microsoft Office 365 Insert a Video into a PowerPoint Presentation