This is the Software Publiher's description.
The app will automatically send all new pictures that you take with your smartphone via email from your Google account to the entered email address.
In other words, the app creates automatically backups of all the photos you take and sends them to any email address you want. It may be any email address, no gmail address required.
You can set the app to do it automatically when you arrive any WiFi network. No USB wiring needed, one less thing to steal your time.