This document provides an overview of conditional formatting in Excel. Conditional formatting allows users to apply formatting rules to cells based on certain conditions or criteria. This enhances data visualization and analysis by highlighting important trends, outliers, and key information. The document describes the benefits of conditional formatting and various rule types, such as formatting cells based on whether their values are greater than or less than a threshold. It also provides instructions for building conditional formatting rules and examples of applications in financial reports, sales data, and inventory management.