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Starting from GitLab 9.3 we support feature flags via
[Flipper](https://github.com/jnunemaker/flipper/). You should use the `Feature`
class (defined in `lib/feature.rb`) in your code to get, set and list feature
-flags. During runtime you can set the values for the gates via the
-[admin API](../api/features.md).
+flags.
+
+During runtime you can set the values for the gates via the
+[features API](../api/features.md) (accessible to admins only).
+
+## Feature groups
+
+Starting from GitLab 9.4 we support feature groups via
+[Flipper groups](https://github.com/jnunemaker/flipper/blob/v0.10.2/docs/Gates.md#2-group).
+
+Feature groups must be defined statically in `lib/feature.rb` (in the
+`.register_feature_groups` method), but their implementation can obviously be
+dynamic (querying the DB etc.).
+
+Once defined in `lib/feature.rb`, you will be able to activate a
+feature for a given feature group via the [`feature_group` param of the features API](../api/features.md#set-or-create-a-feature)