Why prospecting matters
Every customer was once a stranger. Prospecting is the work of reaching strangers and turning them into engaged audiences, the upstream activity that feeds every downstream channel.
It also gets systematically under-credited by attribution. A prospecting ad rarely sees the final click before conversion. Last-click attribution assigns the credit to whichever channel did, usually branded search or direct. Defund prospecting based on its reported ROAS and you slowly starve the funnel of new entrants.
How prospecting differs from retargeting
| Prospecting | Retargeting | |
|---|---|---|
| Audience | Hasn’t engaged with brand | Has engaged (site visit, ad click, etc.) |
| Intent | Low, needs warming | Higher, already curious |
| CPM | Lower (less crowded auction) | Higher (small, premium audience) |
| CTR | Lower (cold) | Higher (warm) |
| Conversion rate | Lower | Higher |
| Attributed ROAS | Lower | Higher |
| Incremental ROAS | Usually higher | Often lower |
The two work as a pair. Prospecting fills the warm-audience pool. Retargeting converts from it. Cut either and the other degrades within weeks.
Prospecting audience types
In rough order of warmth:
- Broad targeting, minimal audience definition. Let the algorithm decide
- Interest-based, Meta interest categories, Google in-market audiences
- Behavioral, actions on third-party sites (less available post-cookie)
- Lookalike audiences, modeled from your existing customers. Usually the strongest prospecting signal
- Demographic / geographic, broad slices, often combined with the above
Modern ad platforms increasingly merge these into algorithm-driven “broad” approaches (Meta’s Advantage+ Shopping, Google’s Performance Max). The trade-off: less control, often better outcomes if the conversion signal feeding the algorithm is clean.
Measuring prospecting fairly
Three approaches help:
- Multi-touch attribution instead of last-click. Spreads credit across the full journey.
- Incrementality testing. Run holdout tests on prospecting to measure actual lift, not just attributed conversions.
- MMM (Marketing Mix Modeling). Top-down regression captures channel contribution above the touchpoint level, particularly useful for prospecting’s diffuse impact.
Together they reveal prospecting’s true contribution, which is usually 2-5× the attributed-ROAS number suggests.
Common mistakes
- Cutting prospecting based on last-click ROAS. The number understates its real contribution.
- Treating prospecting and retargeting as competing budgets. They’re complementary, one fills the funnel, the other converts from it.
- Static prospecting setups. Creative fatigue hits prospecting fastest. Refresh constantly.
FAQ about Prospecting
What is prospecting in paid media?
Prospecting is paid-media targeting aimed at audiences who do not yet know the brand. It is the top-of-funnel counterpart to retargeting, with higher CPMs, lower CTRs, and higher incremental impact than retargeting.
What is the difference between prospecting and retargeting?
Prospecting targets cold audiences (interest, broad, lookalike). Retargeting targets warm audiences who have already engaged (site visits, cart abandoners). Both are needed, prospecting fills the funnel. Retargeting converts from it.
How do I measure prospecting fairly?
Last-click attribution systematically under-credits prospecting. Use multi-touch attribution, incrementality testing, and MMM together to see prospecting’s true contribution, which is typically 2-5× what attributed ROAS suggests.