You can easily share a collection by sending it's link to others or by creating a QR code.

How to Share the Link to a Collection

1. Open the collection you want to share
2. Tap the ⋯ (More) button in the top-right corner
3. Select Share
4. Copy the link or select the app you'd like to share the link on

How to Generate a QR Code For A Collection

1. Open the collection you want to create a QR code for
2. Tap the ⋯ (More) button in the top-right corner
3. Select QR code
4. Tap the Export button to download the code to your photo gallery or share it on another app