How does this work? With PlotSquared?

I have a Minecraft server that I host on my V server. I have on server knows zBs. VaroxCraft seen that when you see a GS claimt on the GS, a tree with start items appears in a box. How does this work? So that then I can make a certain building appear.

I hope you can help me.

Information:

V-Server: Debian 9.0

Minecraft Server Version: 1.8.8 with Viaversion

Plot plugin: PlotSquared

If you need more information just write me.

Contact:

TS: LegitGames.ml

Minecraft Server: LegitGames.ml

Minecraft Name: Ludibundus

Discord ID: Ludibundus # 9031

Again and again I ask Minecraft, another reason why I always ask "ask for you"