As a marketing professional, I've had to put together my fair share of reports with the help of messy data sheets. The Google Sheets data cleanup feature helps keep that data tidy by suggesting corrections and providing insights into formatting inconsistencies and duplicate rows or columns. To use this feature, users can click on Data > Cleanup suggestions in Google Sheets, where they can review and apply suggested changes to improve the cleanliness of their data. While the feature is helpful, it's essential to note that it may not catch all potential issues and should be used as a starting point for human review to ensure accuracy.