Visulazations are a great way to get a sense of the scale and proportion of your Gmail data. who knows what kind of hidden insights you might find!
Special info cards give you insight into how you might be able to optimize your emailing habits, with suggested subscriptions to drop, or filters to create. All of these are personalized to your information, so you might not always see them.
Gmail Analysis gets all of its data and runs all the calculations with JavsScript right in your browser, that means that none of your data is going to our servers. We do however keep track of some statistics (like Google Analytics) to see how many people visit our site, and what they like. If you have any questions, feel free to ask firstname.lastname@example.org