Category pages failed at Sierra because they treated motive like interchangeable. We replaced commodity grids with story-driven journeys in a 4-week sprint, backed by GA4 custom events and Clarity heatmaps. Result: session-to-PDP click +17%, qualified leads +34%, bounce −16%, ATC +27%, all on 1.1M BigQuery events.
Category pages look simple, but they're the place where buyers decide "am I in the right store?" Most stores treat them as static shelves. We treated them as a two-step conversation: who is this visitor, and which path gets them to a product?
Step 1 — Instrument the funnel we didn't have
- Custom GA4 events on session start, category view, PDP click, ATC, form start.
- Clarity heatmaps + scroll depth across every category template.
The quiet insight: category clicks were big, but PDP engagement after the click was weak. Visitors were "buying" a grid, then abandoning floor noise. The top-of-funnel flow was fine; the storytelling was the leak.
Step 2 — Replace commodity with story
Each of the redesigned category modules balanced:
- A guiding first section — why to choose this category was the layout, not a paragraph
- Trust signals up top — guarantees, shipping, and live rating near the first glance
- Intent-filter scaffolding — the user narrows by aspiration ("feed a family of 6") not by schema variables
- Editorial PDP traction — richer previews; the grid became teasers for the product story
Step 3 — Measure like an experiment
We didn't launch "the new design." Each module shipped with a controlled rollout and week-over-week comparisons.
The numbers
| Metric | Δ | | --- | --- | | Session→PDP click | +17% | | Qualified leads | +34% | | Bounce rate | −16% | | Add-to-cart rate | +27% | | Events analyzed | 1.1M (BigQuery) |
What I'd do differently
- Ship the editorial layer first. The story section did more than the grid styling; I'd have inverted the order I built.
- Bank more session-to-PDP variants. We had one strong winner; a second iteration would've run sooner.
This is the deepest writeup for the categories in the category discovery case study. Paired with a cleanup of the checkout flow, it's what made the funnel measureably productive.