Ubuntu recently introduced snaps. Snaps are a new way of packaging applications in a way that there will be no dependency conflicts (because all dependencies are included). The only problem is that Ubuntu will create a snap folder in your home folder that you will most likely never need to access.

If you, like me, find this folder annoying, you can hide it from Nautilus:

cd ~
echo snap >> ~/.hidden

This makes the folder invisible in Nautilus, but it will still be visible in other places (The terminal, for example).

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