Page one should not be ten of the same thing
Performance ranking has a side effect: the grid clumps. One vendor takes the first row. One silhouette repeats in four colorways. Shoppers think the collection is smaller than it is. Merchandisers call it a “wall.”
Product balancing interleaves the collection by vendor, product type, or option so the first screen stays diverse while you still rank on sales, margin, or inventory. It is not a random shuffle. It is a cap on how similar page one is allowed to look.
Balancing vs grouping
Grouping stacks stories: new, then campaign, then the rest. Balancing mixes inside the visible grid so those stories do not become a single-brand stripe. Use both when a marketplace-style catalog would otherwise look like one vendor’s lookbook.
SortWise makes this a practical merchandising control on the Basic plan — next to pins for the few products that must ignore the mix.
Keep the commercial sort
Balancing does not replace profit or revenue ranking. It stops the ranking from painting the fold with twins. If CTR falls after you mix the grid, that is a Strategy Lab question, not a reason to go back to a vendor wall.