Affiliate Marketing Analytics: What to Track

By SelPage Editorial Team — Published and last reviewed October 18, 2026.

Start affiliate marketing analytics with three questions: are people reaching your content, are they following the recommendations, and are those referrals producing approved earnings? Each question may need a different report.

A visit, a click, an attributed order, and an approved commission are different observations. Build a small scorecard that names the source, date range, and definition for every metric before deciding what to improve.

The Affiliate Metrics Worth Tracking First

Record the program's own status names and definitions. Pending, approved, payable, and paid should not be treated as interchangeable. If a report does not provide a metric, mark it unavailable rather than estimating it from a different event.

What SelPage Analytics Currently Tells You

The SelPage analytics guide documents recorded visits, traffic distribution across active stores, product counts, and capacity information. Visit counters use the current UTC calendar month, even though the store-table column currently says “Visits (30 days)”. These counts are recorded page visits, not unique people.

The dashboard does not report outbound product clicks, affiliate sales, commissions, or conversion rates. Use affiliate program reports for their available commercial metrics. If a particular program does not provide clicks, you need another supported measurement setup before calculating click-based measures.

Use Formulas with Explicit Denominators

Write the numerator and denominator next to every rate. The following are useful scorecard conventions; check a provider's definition before comparing with its published figures.

• Session click-through rate: sessions containing at least one affiliate click ÷ eligible sessions × 100. This requires compatible session-level measurement.
• Click events per visit: recorded affiliate click events ÷ recorded visits. Multiple clicks can occur in one visit, so this ratio can exceed one and is not the share of people who clicked.
• Program order rate: attributed orders ÷ program-reported clicks × 100, when the program supplies compatible figures. Follow its definition of an order.
• Earnings per click: finalized commission ÷ eligible affiliate clicks, expressed in one currency. If reporting periods are not linked to the same referral cohort, label the result a period ratio rather than a cohort return.

When the denominator is zero, display “not available” instead of zero percent. Keep missing measurement distinct from a measured absence of activity.

A Worked Example with Illustrative Numbers

Suppose one measured collection has 1,000 eligible sessions in a fixed period. In that same setup, 120 sessions contain a paid-link click and there are 150 click events. Session click-through rate is 120 ÷ 1,000 × 100 = 12%. Click events per session are 150 ÷ 1,000 = 0.15.

Separately, assume a program's matched referral cohort reports 150 eligible clicks, 6 attributed orders, and $18 finalized commission in one currency. The illustrative order rate is 4% and earnings per click are $0.12. These are invented teaching numbers, not benchmarks or a SelPage dashboard example. Do not assume local clicks and program clicks match in real reporting.

Measure Clicks Only Where the Setup Supports It

On a website you control with an appropriately configured Google Analytics tag, GA4 enhanced measurement can record outbound links as click events. Its documentation lists link URL and domain parameters and notes that configured cross-domain destinations are excluded from outbound click events.

Verify the actual event and destination in your own setup, then filter the report to the affiliate destinations you intend to analyze. A generic outbound-click total can include ordinary external links. This describes GA4 on a supported website; it does not assert that a SelPage store includes a GA4 installation or outbound-click report.

Track Campaigns Without Rewriting Merchant Links

Where your destination analytics supports them, UTM parameters can distinguish sources, media, and campaigns. A consistent naming plan might use a source such as a newsletter name, a medium such as email, and a campaign such as an autumn gear guide. Keep a short naming reference so spelling changes do not split one campaign.

Apply campaign naming to destinations you control and can measure, where supported. An added parameter does not create a report by itself. For merchant affiliate links, use the program's permitted tracking IDs or sub-ID tools; do not alter required affiliate parameters or assume that UTMs will report sales back to you.

Use non-personal campaign labels. Review tracking against the privacy rules that apply to your implementation; the ICO's storage-and-access guidance provides UK context for technologies including scripts and tracking links.

Why Analytics and Program Reports Can Disagree

Start with a definition check when totals differ. Compare time zones, date ranges, click counting rules, tracking availability, and filters. A local event can be recorded without a corresponding credited order, and a later purchase can appear after your traffic reporting period ends.

Attribution windows, commission eligibility, cancellations, returns, reporting delays, and status changes depend on the program. Read its reporting notes before treating a difference as a broken link. Avoid joining a store's visit total to a program's orders and calling the result a measured conversion rate.

Use a Small Weekly Review and a Monthly Earnings Check

1. Record the context. Note the reporting period, time zone, source, and any measurement changes.
2. Inspect traffic. Check recorded visits and available source data. Review distribution within the same reporting basis.
3. Inspect interest. Read verified click reports if available. Check destinations and broken or mismatched links before editing copy.
4. Inspect program outcomes. Record attributed actions and commission statuses separately from payouts.
5. Choose one change. Improve a product explanation, destination, or collection structure and record when it changed.
6. Wait for useful evidence. Keep a comparable observation period and account for delays before drawing conclusions.

A store with few recorded visits calls for checking promotion and access first. Visits with few verified clicks suggest reviewing product relevance and clarity. Clicks with weak finalized earnings suggest inspecting destination fit and program outcomes. These are investigation paths, not proof of a single cause.

Make the Scorecard Useful for Your Store

SelPage supports selectable store themes, store categories, and product category assignment. Use the setup guide to organize the collection and the product guide to improve listings. A recorded catalog change gives your next review a concrete question to investigate.

Keep commission disclosures visible as you refine recommendations. See the disclosure wording guide for examples, and review available features before planning a measurement workflow. Open your SelPage dashboard to record a visit baseline and consult current plans for capacity planning.

Sources Checked

• Google Analytics: enhanced measurement events
• Google Analytics: traffic-source dimensions and manual tagging
• ICO: storage and access technologies
• SelPage: current store analytics definitions
• SelPage: product setup and listing fields

Checked October 18, 2026. Examples, review workflows, and scorecard conventions are editorial applications of the cited material. Recheck the applicable guidance and program terms when publishing or changing your setup.