All circle members are automatically considered as core circle members upon joining a circle - even if the user joined as a member without role.
It means they'll take part in the governance decisions of the circle and operations. They can join a meeting, participate to the election process and suggest evolution for their roles and circles. They can work on project, actions and OKRs.
There may be instances where it doesn't make sense for a member or a role to be involved in the decisions of the circle. Typically if that member/role performs an insignificant task or doesn't spend much time involved in the circle. For example, if a role is assigned to 30 people, there might be 5 core members in the role who will be able to work on the governance and the remaining 25 members who will be able to view the role without changing it as non core members.
In these cases, the Circle Leader may opt for those individuals to not be considered core members.
To exclude a member of the governance decision of a circle, edit the assignation of the member for all roles of the Circle and uncheck Core member checkbox.
Non Core Circle Members cannot:
Add tension within the circle
Take part of the validation process of governance out of governance meeting
Attend meetings for the circle
Note: A non core member can be assigned to one or several role, except of core roles.