Block bad data, duplicates, and incorrect dates with these custom rules.

Follow the steps below to create a drop-down list using data validation in Excel. If you want to add a message pop up, you can click the Input Message tab and check the checkbox for “Show input ...

One of the most common tasks in data analysis is counting unique entries within a dataset. This process can be time-consuming and prone to errors when done manually, but Excel 365 offers a solution ...