# Good use cases for groups (to better understand groups vs categories)

**URL:** <https://meta.discourse.org/t/good-use-cases-for-groups-to-better-understand-groups-vs-categories/62875>\
**Category:** Community Building\
**Created:** [Maio 17, 2017, 1:39pm UTC](https://meta.discourse.org/t/good-use-cases-for-groups-to-better-understand-groups-vs-categories/62875 "2017-05-17T13:39:16Z")\
**Posts on this page:** 1\
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**Author:** ![LeoMcA](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/leomca/32/87233_2.png) [@LeoMcA](https://meta.discourse.org/u/LeoMcA)\
**Post date:** [Maio 17, 2017, 7:19pm UTC](https://meta.discourse.org/t/good-use-cases-for-groups-to-better-understand-groups-vs-categories/62875/5 "2017-05-17T19:19:51Z")

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Within Mozilla we utilise groups for category permissions and group messaging.

We import a number of groups from our [community directory](https://mozillians.org/) and restrict certain categories to one or multiple of them. We also use the “_Users who register with an email domain that exactly matches one in this list will be automatically added to this group_” feature to add staff to a number of groups.

We use group messaging with a couple of groups to create “support ticket style” discussions, by setting a “_Custom incoming email address_” for the group. This allows anybody to email that email address, with only that person, the group, and anyone invited, able to see the discussion.

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