These jams are stored in the freezer or refrigerator. No-cook or Freezer jams are different from regular jams in that, they require no cooking of the fruit. Thus, the fruit's natural flavor and color is preserved.
Preservation is different though.
Since no boiling or heating is done, these jams have to be stored in the refrigerator or the freezer instead of on a shelf . The secret of making a successful no-cook jam is the fruit pectin. Pectin helps the jam to set to the right consistency. Fruit contains pectin naturally, but the amount decreases as the fruit ripens. If a fully ripe fruit is used for making jam, you need to add pectin.