Would just be great if they'd have an explanation of what it exactly does but it's nowhere and on the couple posts I found the closer related to that on reddit were with people who were connecting it to their own node. 

And what would be the point if at the end it can't even show your balance? Just weird.

Theorygon

bitcoin_beginners

Opening your keys in different wallets

I have nevermind used Wassabi. Maybe it should download all the Blockchain and without blocks on your oc you won't see balance 