**Checksum for Contribution Pages for Membership Renewals**: To send people to a contribution page for membership renewals use this path where `IDNUMBER` is the ID of your contribution page. This is typically used in Scheduled Reminders for membership renewals, where the `membership.id` will be evaluated to the membership to be renewed:
**Checksum for standard Profiles** (edit mode): To send people to a profile use this path where `IDNUMBER` is the ID of the Profile you want to send them to:
**Checksum for mail 'view in browser' links**: In CiviMail you can use a special link to allow contacts to view the email content in their browser, including the content personalised with tokens.