{
  "best_model": "RandomForest",
  "features": [
    "ad_spend",
    "impressions",
    "conversion_rate",
    "customer_acquisition_cost",
    "platform",
    "product_category",
    "cost_per_impression",
    "spend_cac_ratio"
  ],
  "feature_importances": {
    "ad_spend": 0.0438,
    "impressions": 0.0442,
    "conversion_rate": 0.1226,
    "customer_acquisition_cost": 0.1501,
    "platform": 0.0824,
    "product_category": 0.0615,
    "cost_per_impression": 0.4377,
    "spend_cac_ratio": 0.0578
  },
  "metrics": {
    "Ridge": {
      "MAE": 0.8472,
      "RMSE": 1.0287,
      "R2": 0.4118,
      "CV_R2_mean": 0.4088,
      "CV_R2_std": 0.0152
    },
    "RandomForest": {
      "MAE": 0.7742,
      "RMSE": 0.9334,
      "R2": 0.5157,
      "CV_R2_mean": 0.4923,
      "CV_R2_std": 0.0164
    },
    "GradientBoosting": {
      "MAE": 0.7933,
      "RMSE": 0.9567,
      "R2": 0.4912,
      "CV_R2_mean": 0.4574,
      "CV_R2_std": 0.0145
    },
    "XGBoost": {
      "MAE": 0.795,
      "RMSE": 0.9671,
      "R2": 0.4801,
      "CV_R2_mean": 0.4449,
      "CV_R2_std": 0.0192
    },
    "ExtraTrees": {
      "MAE": 0.7697,
      "RMSE": 0.9266,
      "R2": 0.5227,
      "CV_R2_mean": 0.4877,
      "CV_R2_std": 0.0189
    }
  },
  "platforms": [
    "Facebook",
    "Instagram",
    "Google_Ads",
    "YouTube",
    "Car_Commuting_Network"
  ],
  "product_categories": [
    "Electronics",
    "Fashion",
    "Food_Beverage",
    "Health_Wellness",
    "Automotive",
    "Travel",
    "Finance",
    "Education",
    "Real_Estate",
    "SaaS"
  ],
  "recommendations": {
    "Electronics": {
      "best_platform": "Google_Ads",
      "avg_roi": 5.942
    },
    "Fashion": {
      "best_platform": "Google_Ads",
      "avg_roi": 5.07
    },
    "Food_Beverage": {
      "best_platform": "Google_Ads",
      "avg_roi": 5.198
    },
    "Health_Wellness": {
      "best_platform": "Google_Ads",
      "avg_roi": 5.569
    },
    "Automotive": {
      "best_platform": "Google_Ads",
      "avg_roi": 5.578
    },
    "Travel": {
      "best_platform": "Google_Ads",
      "avg_roi": 5.468
    },
    "Finance": {
      "best_platform": "Google_Ads",
      "avg_roi": 5.873
    },
    "Education": {
      "best_platform": "Google_Ads",
      "avg_roi": 5.674
    },
    "Real_Estate": {
      "best_platform": "Google_Ads",
      "avg_roi": 5.371
    },
    "SaaS": {
      "best_platform": "Google_Ads",
      "avg_roi": 6.124
    }
  },
  "dataset_size": 5000
}