Explain in detailly about this Erd diagram.

ERD The seminar management system will use this database design. This database will help in finding out the seminar dates and the organizer who have listed the seminar and the organizer who have listed the seminar. users user_id:INTEGER user_name:VARCHAR user_location:VARCHAR contact: INTEGER organizer organizer_id:INTEGER organizer_name: VARCHAR organizer_location: VARCHAR seminars seminar_id:INTEGER seminar_name: VARCHAR seminar_type: VARCHAR seminar_date: TIMESTAMP