In order to achieve collaboration, you can use a shared channel to interact with both members of your team or organization that may be inside and outside of your organization. The benefit of a shared channel for people outside your organization is that they can participate without switching organizations.
When should I use a shared channel?
|To collaborate with:||Shared channel||Standard channel||Private channel|
|Everyone on your team|
|Specific people on your team|
|People outside your team|
|People outside your org|
|People outside your org (without them switching orgs)|