What is Mosaikin, and what am I being asked to do?

Mosaikin collects the photos and messages from one event into a single shared gallery that the host keeps afterwards.

Mosaikin is a shared gallery for one event. Someone hosting a wedding, a party or a work event creates the event here, and everyone who comes adds their own photos to the same place. Instead of a hundred photos scattered across a hundred phones, the host ends up with one collection.

As a guest you were probably handed a QR code on a card or a sign, or sent a link. Scanning or tapping it opens the event, and from there you can add photos, sign the guestbook, and look through what everyone else has shared.