- A.Tracking customers grouped by acquisition period to compare retention, revenue, and behavior over time — exposes trends that aggregated data hides.
- B.Comparing two versions of a marketing element with random assignment to estimate which performs better — the gold standard for marketing decisions.
- C.Paid search advertising — bidding on keywords to appear in search results, paying per click, with auctions optimizing for relevance. ✓
- D.Paid search advertising — bidding on keywords to appear in search results, paying per click, with auctions optimizing for relevance.
SEM and Google Ads is paid search advertising — bidding on keywords to appear in search results, paying per click, with auctions optimizing for relevance. The other options describe related but distinct concepts in Digital & Analytics — see the deep-dive guide for the full distinction.
How to think about questions like this
Captures buyers at moment of explicit purchase intent. Questions like this test whether you can distinguish SEM and Google Ads from neighboring concepts. The most common trap is choosing a closely-related concept that sounds similar but applies in a different context.
When you see a definition question on an exam, do two things: (1) translate the question into your own words, then (2) generate the answer in your own words before reading the options. This avoids the cognitive bias of recognizing a familiar phrase as correct just because it is familiar.