# Metric Comparisons

Side-by-side explanations of commonly confused marketing metrics — when to use each, how they differ, and pitfalls to avoid.

## Comparisons

- [MER vs ROAS](https://www.adsights.ai/resources/comparisons/mer-vs-roas) — Blended marketing efficiency vs platform-attributed ad return.
- [Hold Rate vs ThruPlay Rate](https://www.adsights.ai/resources/comparisons/hold-rate-vs-thruplay-rate) — Retention after the hook vs completion against all video plays.
- [CTR vs Thumbstop Rate](https://www.adsights.ai/resources/comparisons/ctr-vs-thumbstop-rate) — Link clicks after the impression vs video hook rate at 3 seconds.
- [CPA vs CAC](https://www.adsights.ai/resources/comparisons/cpa-vs-cac) — Cost per conversion in ads vs fully loaded cost to acquire a customer.
- [VCR vs ThruPlay Rate](https://www.adsights.ai/resources/comparisons/vcr-vs-thruplay-rate) — Percent who finish the video vs platform ThruPlay engagement threshold.
- [ROAS vs ROI](https://www.adsights.ai/resources/comparisons/roas-vs-roi) — Ad-attributed revenue ratio vs profit return on total investment.

Hub index: https://www.adsights.ai/resources/comparisons