Data visualizations are a great way to add interesting content to your email campaign. And with motion involved, even better!
Google recently launched their Data Gif Maker, a tool that allows you to set two different values, assign parameters, and create customizable GIFs that compare your data.
You can show whatever you want to! Poll results, product popularity, search results... whatever you'd like to compare, it's there.
If you need more inspiration for things to compare with this tool, visit Google Trends.