你打算放送以知名度為目標的 Google 影片廣告活動，且想評估以下方面的成效：廣告觸及的使用者人數，以及不同廣告格式在各裝置上的放送次數。除了基本的「影片播放進度」等影片廣告指標以外，你還應該採用哪種成效評估解決方案？

Unique Reach and Frequency" is the correct solution because it directly measures the number of unique users exposed to your ads and how often they see them across devices. This aligns perfectly with the goal of evaluating the "number of users reached" and "delivery across devices" for a brand awareness campaign. "Brand Lift" measures the impact of your ads on brand metrics like recall and awareness, which is valuable for awareness campaigns but doesn't directly address the number of unique users or delivery across devices. "Active View viewability" measures whether an ad was actually seen, which is important for ad quality but not for unique user reach. The "Reach Planner" is a planning tool used before a campaign to estimate potential reach, not an evaluation solution after or during a campaign.