On the All Stores section of your AppScenic Account, you have also a tab called LAST SYNC on the top of your stores' list.

The data you see here is the last time your products were synced between your online store and AppScenic. 

If your store is Connected, then LAST SYNC will show the date when your store was last time synced, and that's whenever there is a product change on your online store.   

And that is what LAST SYNC means!