You can remove leading, trailing, and extra spaces between characters and numbers in Excel using TRIM(), SUBSTITUTE() or Find and Replace.

Removing these spaces can help the Remove Duplicates tool to better detect the duplicate values you want to remove. Think you know how to use Excel?

If your source data is in Excel and has duplicates, run Power Query to remove those duplicates before running a Word mail merge.

Finding and removing blank spaces and rows in Excel is easy and can be done by using the "Find & Select" feature. Here's how to delete blank rows in Excel on a Mac or PC.