To see the history of contracts from your account.
Profile levels for sellers on Srilance
If you want to be promoted on Srilance
The accounts of the type Freelancer or Agency are used to work for the available jobs.
The difference in a freelancer account and an agency account, is that a freelancer account is associated to a single person, while an agency account is registered for a company/agency.
There is also difference in the type of jobs for agency accounts and freelancer accounts.