Cross-platform and view-based are the two conversion types, you should capture in your reporting in order to measure the full value of your action campaigns.

• Mono-platform and last click
• Cross-platform and last click
• Mono-platform and view-based
• Cross-platform and view-based

The correct answer is: Cross-platform and view-based

Explanation: To properly evaluate an action campaign’s full impact, you need to capture two conversion types in your reporting: cross-platform and view-based conversions. Cross-platform conversions encompass interactions and conversions happening on multiple devices and platforms, whereas view-based conversions record user involvement, such as watching at least 10 seconds of an advertisement or encountering an impression that leads to a conversion. Collecting data on both of these conversion types allows you to gain a thorough understanding of your action campaign’s performance and fine-tune your tactics accordingly.