Available - the lead is available to be acquired
Acquired - the lead has been acquired by you already
Completed - the lead is no longer available; it has either been acquired the max allowed times (specified by the client) or the client has chosen a professional already
Approval Requested - you have requested an approval for a lead that requires approval
Approved - you have been granted an approval for a lead that required approval; you can acquire the lead
Approval Declined - an approval has been granted to another professional
Return Requested - you have requested a return for a lead that you have acquired (read about returns here)
Return Approved - a return has been approved and money refunded (if the lead was for a fee)
Return Declined - your return request has been declined