What does the label field in Bitcoin-Qt mean? I tried to get involved with Bitcoin on iPad, couldn't download a wallet and thought a paper wallet was an alternative; I generated said paper wallet and used the address to buy coins.

I realized I couldn't access the coins, so I bought a macbook to download a wallet. Assumed I could just add the address from the paper wallet, but its asking for a "label."
The label is just a short, memorable name for your client to refer to that address.

It can be anything, or nothing.