One innovative use case I've encountered is using Google Sheets as a project management tool. By utilizing conditional formatting and custom formulas, we were able to track project tasks, deadlines, and progress, all in a collaborative and easily accessible platform.

I've seen Google Sheets being used as a live data dashboard. By pulling data from different sources and using built-in visualization tools, we were able to create dynamic and real-time dashboards for tracking key metrics.

One interesting use case I've seen is using Google Sheets for inventory management. By setting up automated scripts and using data validation, we were able to keep track of stock levels, generate purchase order suggestions, and even send email notifications for low stock items.

In my experience, Google Sheets has proven to be a powerful tool for conducting surveys and collecting data. We leveraged the Google Forms integration to create customized forms, and then used Google Sheets to collect, analyze, and visualize the survey responses.