Your Collection and Wantlists are set private by default. To make them public, go to your profile page from the drop-menu under your username, then Settings in the left column. Check the boxes next to lists you’d like to be made public (you can also share Following list). Save Settings. Now anyone with the URL will be able to see what’s in your Collection and Wantlist. You can share it via social media, or send to a friend directly.