Decks fail in the outline, not the design: 40 slides of everything instead of 10 slides of argument. This template turns raw material (notes, a doc, a braindump) into a presentation skeleton: one idea per slide, a headline that states the point (not the topic), three supporting bullets max, and a suggested visual — sized to the actual time slot.
The two rules that carry it: headlines are claims ('Churn is concentrated in month 2', never 'Churn overview'), and the slide count comes from the talk length, not from the material. Whatever doesn't fit the argument goes to a backup-slides list, which is where 30 of your 40 slides belonged all along.