The Create activity is used to create new Note or Page objects.
The Update activity is used to edit existing Note or Page objects.
The Delete activity removes an existing Note or Page objects.
The Announce activity is effectively what is known as "sharing", "reposting", or "boosting" in other social networks.
The Like activity is effectively what is known as "like", "favourite". Activity is used with Note
A Follow enables actors to access and retrieve content from other actors as soon as it updates. Activity is used with Person or Group objects.
The Accept activity sends a positive response, such as confirming a Follow activity.
The Reject activity sends a negative response to Follow activity.
When Kbin receives an Undo activity, it deletes the corresponding object from the database. Activity is used