How do I download csv files from Trust wallet?

How do I download csv files from Trust wallet ?

I dont think they allow exporting csv’s yet, you can use xpub keys though or create a cav manually with your deposits ad withdrawals.

I don’t quite understand what xpub key is. Is it the asset’s public address?

If it is, how do I get is into your system? Do I copy it and do what with it?
Please forgive me for asking what sounds like silly questions, but I am new in this space.

And what is cav? Sounds like a file extension?

Waiting for your king answers, Thanks.