Measurement, Optimization, and Performance Analysis
Measurement, optimization, and performance analysis tests whether you can read Display results correctly and turn them into specific actions. The exam covers core metrics, attribution, reporting segments, and optimization decisions.
Core rules
- Core metrics include impressions, CPM, viewable impressions, viewability rate, clicks, CTR, CPC, conversions, conversion rate, CPA, conversion value, ROAS, frequency, and unique reach.
- Know the formulas: CTR = clicks divided by impressions; CPC = spend divided by clicks; conversion rate = conversions divided by clicks; CPA = spend divided by conversions; ROAS = revenue divided by spend.
- Attribution matters. Last-click is common, data-driven attribution distributes credit, and Display can report view-through conversions separately. Conversion lag and cross-device paths can make early results look weak.
- Reports can be segmented by placement, audience, asset, device, time, and geography. Segment before concluding that a campaign is simply good or bad.
- Optimization actions include excluding poor placements and apps, refreshing creative, adjusting audiences and bids, testing landing pages, and managing frequency.
Worked example
A campaign spends $4,000, receives 1,000,000 impressions, 2,000 clicks, 40 conversions, and $8,000 revenue. CTR = 2,000 / 1,000,000 = 0.2%. CPC = $4,000 / 2,000 = $2. Conversion rate = 40 / 2,000 = 2%. CPA = $4,000 / 40 = $100. ROAS = $8,000 / $4,000 = 2.0. If the benchmark CPA is $80, the campaign is missing target. A placement report shows one app consumed 30% of spend with zero conversions, so exclude it; an asset report shows frequency of 8 on one creative, so refresh it. The reasoning is to isolate the cause before changing bids.
Traps
Optimizing to CTR instead of downstream conversions; ignoring view-through conversions or comparing campaigns with different attribution models; acting on too little data; failing to segment by placement or audience; confusing frequency with reach; and refreshing creative without checking whether the landing page is the actual constraint.