Transferring an already registered domain entails switching the domain registrar that provides the registration service, so after the transfer itself, you’ll have to manage things like renewal fees or DNS modifications through the new registrar. The transfer procedure itself is standard with most domain extensions. Some country-code extensions are more specific and entail different steps, but in the general case transferring a domain name entails several basic procedures and one of them is unlocking the domain name. The domain lock is a security feature, which is being adopted by more and more domain name registry organizations. It’s a standard feature supported by all generic TLDs. If a domain name is locked, it will be impossible to initiate a transfer process, so nobody can even try to snatch your domain. The lock can be removed only through the account where the domain name is registered in the first place and all new domain names that support this functionality are locked by default the moment they are registered.