Can anybody explain the permission rules in confluence?
What is product access?
What is side access?
What are side-admins compared to an administrator?
What are groups and what are teams and how to administer their access to pages and/or spaces?
What is space & page access compared with side access?
What happens if I grant somebody space access through a group, but kick him/her out of product access?
Is "confluence-user" just a standard group created by confluence?
Please explain it as you would need to explain it to my 90 years old grandma as the documentation is not really helpful.