This is the 3049th most frequent German word.
betreten
To enter or step into.
The verb 'betreten' is used here to express the act of entering a specific place.
Ich betrete den Raum.
I enter the room.
In this command, 'betreten' is employed to indicate the act of stepping onto or physically accessing the green area.
Bitte nicht die Grünfläche betreten.
Please do not step on the green area.
In this sentence, 'betreten' conveys the act of accessing a location, in this case, the building.