To allow users to post comments on your albums, you first need to ensure that your album's privacy settings permit public access or at least grant permission to the desired audience. Depending on the platform you're using, whether it's social media like Facebook or photo-sharing services like Google Photos, you'll typically have the option to share the album via a link or by inviting specific people. Once shared, users can access the album through the link or their own account if it's a platform-based album, snapchat premium app, and they should see an option to leave comments directly under each photo or on the album itself. Just make sure commenting is enabled in your settings to allow interaction.