Sales engineering is a hybrid technical and sales role focused on delivering product demos to enterprise prospects. Sales engineers translate customer pain points into product features, deliver live demonstrations, handle technical objections, and justify ROI. Unlike pure sales, SEs require deep product and technical knowledge. Unlike engineers, SEs must communicate to non-technical stakeholders and think about customer value, not just features. Effective demos follow a narrative: understand the customer's problem, show how the product solves it, demonstrate ROI, and call to action. Demos are live (interactive, customizable) or pre-recorded (polished, risk-free). Most SEs use a mix.