In normal circumstances either the tutor or the child has to travel to meet up and then one delivers the tutoring service and the other accepts the service. But online tutoring service is can be more reliable and dependable in terms of accessibility.
a. There are instances when due to natural calamities either of them fails to make it.
b. The tutor might fall ill while your child is preparing for the exam.
c. It can be that your child cannot travel without the adult guidance.
d. A sudden guest or an important work might hinder you from leaving the house.