In this concise instructional video, the speaker walks viewers through the fundamentals of calculating marketing ROI to determine whether advertising spend is effective. He presents a simple ROI formula, illustrating with a 500,000‑won ad investment that generated 1,500,000‑won revenue, resulting in a 200% ROI. The video then explains related metrics: ROA (revenue per ad spend), noting that campaigns exceeding 300% are generally healthy, and CAC (customer acquisition cost), calculated by dividing total ad spend by the number of new customers. The speaker advises calculating ROI separately for each channel—Naver, Instagram, and YouTube—to identify the most profitable platforms, and recommends measuring these figures weekly to continuously compare performance and let the numbers guide strategic decisions. Finally, he offers ROI‑improvement consulting services, directing viewers to his profile link for more information.
