Can u explain this part of code

[PARKER-X]

{% for activity in activity_page.object_list %}
{% include "circles/circle_activity.html" with activity=activity form=add_activity_form %}
{% endfor %}

what is activity_page?

[brylie]

The activity_page variable refers to the page that displays activities for a Circle. The page context data contains a list of Activity objects called object_list. The template is looping over the Activity objects and passing each one to the circle_activity..html along with an edit form.