Why test at all
In affiliate marketing you almost never nail the winner on the first try. Testing swaps intuition for numbers: you launch a few variants, watch the metrics, and keep the one with the higher ROI. Without tests you’re just burning budget on guesswork.
The golden rule: one variable at a time
If you change the creative, the lander, and the audience all at once, you’ll never know what actually moved the needle. Test one element and hold everything else fixed:
- Creatives — same lander, different creatives;
- Landers — same creative/traffic, different landers;
- Audiences/placements — same creative + lander, different targeting;
- The lander’s first screen — headline, CTA, image.
How much traffic you need
The most common mistake is drawing a conclusion off 50 clicks. That’s noise, not data. Rough benchmarks:
- Creatives: ~1,000–2,000 impressions, or until you see a meaningful gap in CTR;
- Landers: at least 100+ clicks per variant, ideally up to the first 5–10 conversions;
- If it’s 2% vs 2.1% on 100 clicks — that’s not a difference, keep testing.
How to test landers
- Build 2–3 versions of the lander that differ by one element (headline / first screen / CTA);
- Split the traffic evenly through your tracker (a 50/50 rotator);
- Wait for a large enough sample;
- Keep the winner and run your next iteration off it.
It helps when the landers are already different out of the box: every one of our landers is unique in design and copy, so you can grab a few variants and split-test them right away — no hand-coding required.
Common mistakes
- Calling it on a tiny sample — the number-one mistake.
- Several changes at once — you won’t know the cause.
- Not killing the loser — you keep burning budget on a dead variant.
- Testing without a tracker — you can’t see what’s actually converting.
Bottom line
An A/B test is discipline: one variable, a sufficient sample, decisions made on numbers. It’s the cheapest way to lift ROI systematically. Grab a few lander variants for your split from the pool or order a batch.