Are you an Event Host, or a Guest?
Event Hosts can download the Share Your Photos app to their smartphone and create an account. From there they can start creating an event and sending out invites!
Guests download the app and then join an event by using the link an Event Host sent to them or by searching for their event.
From here, anyone in the event can start uploading their photos, viewing other event photos, saving to their own device, or creating custom gifts and keepsakes.