Courses and course formats

when we add a page, for example to course course and select the first choice (Do not indicate activity completion) on Activity completion, this activity doesn't appear in  COMPLETION PROGRESS Block and if the course contains only this activity, the block shows: "There are no activities or resources with activity completion set or no activities or resources have been selected. Set activity completion of activities and resources, then configure this block.". 
so please, how can I indicate to Moodle to consider this resource (page, file...) like an activity without allowing learners to mark themselves as complete ?
In the block settigns we have "activities included " will it help me ?? and how can i select activities to include ?? thank you very much !