What does Exodus 27:9 mean?

Set up a courtyard around the tent. On the south side, put up linen curtains, each about seven and a half feet tall, stretching out a hundred and fifty feet. Use twenty posts and twenty bronze bases to hold them up, with silver hooks and bands on top. Exodus 27:9 - Modern Text Bible

(The courtyard is a defined, sacred space. The linen curtains and posts create a clear boundary, separating the holy area from everything else.)