What we're testing
Pairs Socks
18 October 2026

Every live test on the Pairs Socks ad account, what it is meant to find out, and where it stands. Each test has a verdict rule set before it starts, so a test showing "too early to call" is on track, not failing. Called tests move to the bottom with what we learned. Figures refresh daily and include today, which is partial.

1 running0 waiting to start0 called
Running now

Brand GIFs: 2 to 4 second cuts vs the original 30 to 40 second slideshows

Running, too early to call Ad creative Started 14 Oct
What we think

Alice's read: the brand slideshows change image far too slowly to hold attention in a feed. Re-cut to 2 to 4 seconds per image they should earn more clicks for the same copy.

What is different between the versions

The pace of the slideshow only. Same images, same approved copy, same landing page and product set. The short versions run in their own small ad set so the big Q4 ads cannot starve them.

When we call it

£350 spent on each version, or 14 days, whichever comes first. Not before.

Progress to a verdict29% · due around 28 Oct
VersionSpentLink clicksCTRPurchasesCost per purchasePurchases per clickROAS
Short cuts, 2 to 4 seconds per image Ad 535 to 540 £44.50431.48% 3£14.836.98%2.99x
Original slideshows, 30 to 40 seconds Ad 489, 490, 527 to 530 £13.24131.39% 0–0.00%0.00x
Read on: click-through rate. Cost per purchase once there are enough purchases to read.
£57.74 spent across 2 versions in 4 days. Too early to call; verdict due around 28 Oct.
What this will tell us

Whether the slideshow format works for Pairs at all when the pace is right, which decides whether the five Christmas GIFs go live on 2 December in the short cut.

Notes

The originals ran for a day and a half from 14 October before Alice flagged the pace, so their numbers are a thin baseline rather than a fair comparison. The real read is whether the short cuts earn their place against the rest of the Q4 ads.

What we've learned
No tests called yet. Learnings land here with the decision we took.

Spend, clicks and purchases are as reported by Meta for the ads in each test, from the test's start date to today. Where versions share an ad set, Meta decides how much each one spends, so compare cost per purchase and purchases per click rather than totals. A test is only called once its rule is met; stopping early on a good week is how false winners get made.