What is a Smart Album
A Smart Album is an photo album that shows all photos that meet the criteria you specify. With Smart Album you can tag your photos with keywords or assign a star rating. After that you can create a album that shows all photos that match the specified keywords. If for example you tag your photos with the names of your children you can create an album with as criteria the name of your child; Smart Album will automatically show all photos. You can also create a album that only shows photos with all your children. i.e. the same photo can appear in multiple albums.
How can I delete an Smart Album
You can delete an album with the right to left swipe over the album name, or by pressing Edit and tap the minus sign.
How can I delete a filter
You can delete filter with the right to left swipe over the filter name.