An ‘unconditional’ offer is a firm offer of a place without a specific condition attached. Your place is generally secure, unless the overall interest in that course is not sufficient for it to run.
An ‘conditional’ offer is an offer of a place that requires something else from you – e.g. gaining a particular grade in one or more exams that have not yet been sat. Once you meet the condition(s), your offer is likely to be upgraded to ‘unconditional’.
For further information, please contact your Faculty Administration Office.