This operation will assign a task to users or groups of users, which are defined by the parameter "variable name for actors prefixed ids". This parameter either accepts:
the user name,
the group name (the syntax for groups is group:groupname),
a context variable referring to them. This context variable can typically be defined in the "Get Users and Groups" operation that must be in the same automation chain. That operation stores a variable with some users and groups given the rights they have on an input document.
Once a user that is assigned the task accepts or rejects the task, the automation chain given in parameters of the Create task operation is executed.