What is account permission?

In EOS system, each Private/Public key can control multi accounts. Account will be Owner or Active. With Owner account, you can set permission for each account (Active). With Active account, you can use EOS inside the account.

The EOS account created through our FREE campaign has OWNER authority - the highest permission.

More information:

https://github.com/EOSIO/Documentation/blob/master/TechnicalWhitePaper.md#role-based-permission-management