Subscription is a special method in digital world to direct connect with target members of visitors. It is paid and unpaid both. In this scenario Subscription means "The Newsletter Subscription".
Through website ****You can collect the visitors email ids and use it to send the School newsletter to site visitors****. It will sent regular basis, weekly or monthly, it depends on you that how frequently you are wishing to connect with visitors.
YOU SHOULD READ THESE ARTICLES TOO -