what are the group in no.2 roblox called

I’m not sure which “No. 2” Roblox group you mean from that wording alone. The most likely match in Roblox context is just a group or groups page, since Roblox uses groups for teams, communities, and game memberships.

What “group” means on Roblox

Roblox groups are the official feature used for creators and players to organize around a game or community. You can join public groups directly, while private groups require approval.

If you meant a specific “No. 2”

I don’t have enough detail to identify the exact group name from “No. 2” alone. If you can send the game name, a screenshot, or the full sentence where you saw it, I can help pinpoint it.