Active voice vs Passive voice

*Active voice:* 
1. Used in daily life.
2. Sentences start with subjects
3. More focus is on subjects as compared to objects.

I have completed that task.

 *Passive voice*:
1. Used in business English.
2. Sentences start with objects.
3. More focus is on objects as compared to subjects.

 *Examples* :
The parcel has been delivered. The parcel has been dispatched.
 Your order has been placed. Your tickets have been booked. Your salary has been credited.