Before you build anything, you should validate that someone actually wants it --- and TK Kader makes the case that landing pages are the fastest, cheapest way to do that. This video teaches the Lean UX approach to idea validation: designing a simple landing page that communicates your value proposition, driving targeted traffic to it, and measuring sign-up intent as a proxy for real demand. Kader covers how to write copy that resonates, what to include (and not include) on a validation landing page, and how to interpret the results to decide whether to proceed, pivot, or kill the idea. He also addresses the common objection that landing pages feel deceptive --- and how to run validation ethically while still gathering honest signals. For any founder wrestling with whether their idea has legs, this session offers a repeatable testing methodology.