What makes a shot powerful

...so I had some spare time during practice, and I keep thinking about what makes a shot a finisher?

I've arrived to the conclusion that these 3 things make a shot powerful:

1. Speed

2. Spin

3. Placement

I think there is more to it than these 3 things. Are there any other factors that makes a shot powerful?

Hi Romeo,

An effective shot will focus on all those 3 areas.  However faster or more spin is not necessarily more effective.  Variation can be more effective than all out speed and spin.