Can anyone comment on specifics of how the Agora system used here work in practical terms? For instance do ballots have a QR code? How are the entered into the

Can anyone comment on specifics of how the Agora system used here work in practical terms? For instance do ballots have a QR code? How are the entered into the ledger at polling stations, etc? I'm happy to see articles on the practical benefits of blockchains. I feel like they been drowned out by the media hysteria of cryptocurrencies lately.