How Most-impressions ranking works
Ranks by raw reach — the sum of impressions in the window — so the most-seen products lead, which grows awareness even when they aren’t the best converters.
Most impressions ranks by raw reach — the sum of impressions in the window. It’s an awareness signal: most-seen first, regardless of how well they convert. Products with no impressions in the window are left out.
1. The collection, unranked

A normal collection page. The order is whatever the catalog lists — the best performers could be buried on the second row where few shoppers scroll.
2. The ranking engine scores it

The engine sums each product’s impressions from the storefront pixel over the window. A product that converts brilliantly but is rarely seen still ranks below a widely-viewed one — reach, not conversion, sets this order. Engagement signals measure in whole days, so an hours-based window counts as one day, and a Period or Snapshot window falls back to the last 30 days.
3. The front row gets discovered

The strongest products now fill the front row — the slots that get the most views and clicks. That’s the payoff: ranking turns your best products into the ones shoppers see first. If fewer products have impressions than your Max products cap allows, the leftover slots are filled from the collection’s current order, below everything that was actually seen.