The device that broadcasts your Wi-Fi; a bigger office needs several so every corner has signal.
Like a lighthouse for your office: one gives light to a patch of water, and a long coast needs several.
A four-person accounting office set up a WAP five years ago with WPA2 and a simple password printed on the wall. Former staff and a few neighbouring tenants still had it. Nobody had changed it because nobody knew how.
Network covers the firewall, switch and on-premises authentication, and WAPs are part of that network. Keeping their firmware current, their passwords rotated and guests separated is the kind of work that card looks after.
Example scenario: A small physiotherapy clinic had three WAPs from three different years, each configured separately. Patients and staff had to pick which network to join depending on the room. Replacing them with three managed units under one configuration gave one network name across the building and one place to change the password.
Is a WAP different from a router?
A router connects your network to the internet and assigns addresses. A WAP just adds Wi-Fi. Home routers bundle both; business networks keep them separate.

Every WILDCARD card exists to solve one named problem. Find yours.