Skill #17

From: Duckling's Cuddle Bingo Skill Game on Day 354
Form: A small plush baby swan. Hug it for the skill.

Skill: Waitressing

But what does that even do:
✿ Similar to the last skill, she grew up he grew up watching her grandparents run an inn and helped them out a lot. So she would have basic waitressing skills! Yes.

So that means what:
✿ NPC/Merchant ability level-up and customer service skills?