When using Product Data Sheets and Layout sheets, we sometimes get miss matched SKUs and this can cause major delays in project delivery.
As such, in the 4min video, we can look to save our self hours if not days of delays. We simply rely on on command in excel along with Conditional formatting to visually help us 
=COUNTIF()
See the video on how this is used applied to product data sheet and Layout sheet:
Good luck and do reach out if you need further help