Marketing Funnel and Campaign Analytics

What is a marketing funnel?

A funnel describes the stages a person passes through on the way to becoming a customer.

Measuring each stage shows where potential customers drop off.

Conversion rate

Conversion rate = conversions ÷ eligible opportunities × 100

The denominator must be clear:

These are not interchangeable. Always state which one you used.

Example

• Overall impression-to-purchase rate: 25 ÷ 100,000 = 0.025%
• The biggest absolute drop is impressions → clicks; the step conversion rates show where improvements may have the most effect.

From the original example: if 2,000 visitors arrive and 100 sign up, the visitor-to-signup conversion rate is 5%. If a campaign brings more visitors but the same number sign up, traffic has increased without improving conversion.

Compare campaigns carefully

Attribution decides which channel gets credit when customers interact with several:

Different models can rank the same campaigns differently. Check which model your analytics platform uses.

Common mistakes

• High CTR ≠ valuable customers. Clickbait ads attract low-intent users.
• Comparing campaigns over different periods or seasons.
• Ignoring budget and audience differences.
• Ignoring tracking gaps (ad blockers, cookie consent, cross-device journeys).
• Judging only short-term conversions without looking at retention or lifetime value.

Try it: Create a simple funnel with impressions, clicks, visits, and signups. Calculate the conversion rate between each consecutive stage.