Here are some specific examples of registration:
* Students register for classes at their school by submitting a registration form and paying tuition.
* Athletes register for a sports league by submitting a registration form and paying a league fee.
* Voters register to vote by submitting a voter registration form to their local election office.
* Attendees register for a conference or event by submitting a registration form and paying a registration fee.
In most cases, registration is required in order to participate in an activity. It allows the organizer of the activity to keep track of participants and collect payment.