Sometimes duplicate data is useful, sometimes it just makes it harder to understand your data. Use conditional formatting to find and highlight duplicate data. That way you can review the duplicates and decide if you want to remove them. Select the cells

Click the Home tab, and then click the Conditional Formatting button in the "Styles" area of the toolbar. Select Highlight Cells Rules on the menu, and then Duplicate Values. Now, choose how you'd like Excel to highlight the duplicates in yo

Select the data you'd like to remove duplicates from, then click Data > Remove Duplicates. You will be asked which columns you'd like to include in your search for redundant data. This is useful if there is one column that wouldn’t includ