If you want duplicate values to stand out in an Excel spreadsheet, you can choose between two conditional formatting rules.

How to Duplicate Words in Excel. Along with being a powerful spreadsheet application that allows you to perform complex calculations, Excel is also an effective data entry tool for your small ...

How to Show Duplicate Records in Excel. As your business grows, so too will the documents and spreadsheets that you use to help keep things running. Eventually, the spreadsheets may get so big ...

By using the Highlight Cells Rules, you can highlight duplicate cells in your Excel worksheet to avoid confusion and mistakes.

If you wish to count the same or duplicate values in a column only once in Excel or the count of occurances of duplicate values, read this article.