What is the difference between paraffins and olefins?

The term 'olefins', also known as alkenes, are a large number of compounds that contain carbon and hydrogen and have at least one double bond in their structure.

Paraffins, also known as alkanes, are a large number of compounds that contain carbon and hydrogen and have single bonds only (fully saturated). They may be linear (normal), branched (iso) or cyclic (ring structures).