Support the Creation of Effective Ad Creatives
Table 4. Comparison of NDCG between the CVR directly predicted by the single-task model and the CVR (#conversions / #clicks) calculated from the multi-task GRU model’s predicted conversions and clicks. The threshold value for calculating NDCG is assumed to be a CVR of 0.5 or more.
['Model Single-task', 'Model Vanilla', 'NDCG [%] 80.54']
Because several previous studies predicted the CVR directly, we also calculated it, using the prediction of the multi-task learning model, and compared the accuracy. In a multi-task model, the CVR can be calculated by dividing conversions by clicks. The prediction performance of the multi-task model is higher than that of the single-task model. Although the number of clicks and conversions predicted by multi-task learning may not always be close to the ground truth, the ratio of the number of clicks to the conversion number is captured properly.