Probation and parole both are privileges of law. The nature of probation is determinative, while parole is administrative. On probation, a criminal grant by the judge is an alternative to imposing a jail sentence. If the judge thought that the probationer is not a threat to society then gives chance to the probationer to freely live in the community but applied certain conditions that must abide by.
On the other hand, in parole offender has served a portion of a prison sentence. In this period of time his because of his good behavior before the completion of the sentence he is released from jail either temporarily or permanently but applied certain conditions that must abide by.
Probation and parole in both periods the offender must report regularly to an appointed probation/parole officer and if the condition breaks then the court may revoke probation or parole and the probationer to serve a jail sentence. Conditions may include participating in rehabilitation programs, submitting to drug and alcohol tests, and maintaining employment, living within state or county lines.