Refers to the point where something begins, whether physical (a journey, a line), temporal, or abstract (an idea, a discussion).
The starting point of this bus route is in front of the station.
Let's clarify the starting point of the discussion.
Taking Tokyo as the starting point, the shinkansen lines extend across the country.
That incident became the starting point of the national movement.
It takes two hours by car from this road's starting point to its terminus.