除了歸因之外，還有哪個方法可用來分析媒體投資報酬率 (ROI)？

Marketing Mix Modeling (MMM) is a statistical technique used to analyze the effectiveness of various marketing inputs on sales and ROI. It helps businesses understand how different marketing channels contribute to overall performance, beyond just attribution. MMM considers both online and offline factors, as well as external influences like seasonality or economic conditions, providing a holistic view of marketing impact. Conversion Lift measures the incremental impact of an ad campaign on conversions, but it's a specific measurement for a campaign, not a broad ROI analysis method. Smart Bidding is an automated bidding strategy in Google Ads, not an analytical method for ROI. vCPM (viewable Cost Per Mille) is a bidding strategy focused on impressions, not an ROI analysis technique.