Do any villagers buy kelp?

Excuse me, I'm quite curious about something. I've been wondering, do any of the villagers in the area purchase kelp? Is it a popular item among them? Or perhaps, is there a specific reason why they might choose to buy kelp? I'm just trying to understand the local culture and traditions better, and kelp seemed like an interesting aspect to explore. Could you please elaborate on this topic for me? Thank you in advance for your assistance.