What is "default" in this Pluto notebook on JuliaHub?

General Usage
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1

What does “default” mean in the screenshot below? It’s the only option in the drop-down.

Screen Shot 2021-08-08 at 1.46.33 PM
Screen Shot 2021-08-08 at 1.46.33 PM2808×1872 570 KB

2

Turns out it’s the “folder” on JuliaHub where the notebook is saved!