After you enabled the online signing link of your waiver under the "Template Settings" page. Your customers could able to sign the waivers through your online signing link ahead of the visit.
When your customers signed the waivers through online signing link, the waivers will go under Pending Waivers List first for you to accept. After the waivers been accepted, they will merge to Recently Signed List.
You could skip the "accept" step by enabling the "auto-accept pending waivers" under"Template Settings" page.