The needful can be achieved using the COUNTIF function. You could either count the frequency of duplicates in Excel or the order of their occurrence in Excel. Count the frequency of duplicate values ...

Use Excel data validation to prevent duplicate values in a column Your email has been sent Prevent duplicates before they happen by combining a simple function with data validation. Excel has built-in ...

To clean up the messy data, it needs to be loaded into the Power Query Editor.

How to combine values from a column into a single cell using Microsoft Excel’s Power Query Your email has been sent The article How to concatenate values in a single Excel column to a single row shows ...