A Chatter private group is a type of Chatter group that allows members to share feedback and ideas with each other in a secure and exclusive space; only members can see and post in a private group. It can be used by Ursa Major Solar to create a space for product owners to collaborate with just the product team by creating a Chatter private group and adding product owners as members. Using quick actions to log communication, configuring a Chatter public group, or adding activity history to document tasks are not solutions for creating a space for product owners to collaborate with just the product team; they either do not provide privacy or do not support collaboration. Reference: https://help.salesforce.com/s/articleView?id=sf.collab_groups_overview.htm&type=5