If you choose Kodak Gallery, and your pictures will be uploaded to your Kodak gallery account and a link to your pictures will be sent to your guests. Once the link is clicked, your images will launch into a slide show for your guest to view. The benefit, you aren't sending multiple files which could mean lengthy downloads or running into MB attachment limitations on your and your friends email accounts. Kodak Gallery requires an account to utilize this service. You can use your current Kodak Gallery account or create a new one. It's simple to do and free.