Catalog Growth
Added New Products but the Campaign Structure Never Scaled With the Catalog
The product catalog has grown significantly, but the campaign structure still looks like it did when there were a fraction of the products, and performance is showing it.
As a product catalog grows, the campaign structure built for a much smaller lineup often gets stretched to cover the new inventory rather than rebuilt to properly represent it. New products get lumped into existing campaigns and ad groups where they do not really fit, diluting relevance and hiding true performance differences between products. Scaling the structure alongside the catalog is what keeps growth from quietly working against itself.
A Structure Built for a Different Catalog
The original campaign structure made complete sense when the catalog had a modest number of products, each ad group organized around a clear, tight theme that matched exactly what was being sold. As the product line expanded over time, adding new products felt easier to just slot into the closest existing category than to rebuild the whole structure around a bigger, more diverse catalog.
Years of this incremental slotting later, ad groups that were once tightly themed now contain a wide mix of products that share only a loose resemblance to each other, and the ads and keywords built for the original narrower theme no longer represent everything being advertised inside them. The structure that used to be a strength has quietly become a source of irrelevance.
How This Shows Up in Performance
When an ad group contains products that do not closely match the keywords and ad copy driving traffic to it, quality scores suffer because relevance is diluted across a wider range of products than the ad was ever written to represent. A shopper searching for one specific product lands on an ad and page experience built around a slightly different, adjacent product, which hurts both click through rate and conversion rate even though technically the right general category of product exists on the site.
This also makes performance data harder to interpret, because a single ad group blending several different products makes it impossible to see which specific products are actually driving results and which ones are quietly underperforming while hidden inside an aggregate average. Products that deserve more budget and products that deserve none look identical in a report that only shows ad group level performance.
Rebuilding the Structure Around the Real Catalog
The fix is restructuring campaigns and ad groups to genuinely reflect the current catalog, which often means significantly more granular segmentation than the original setup, along with feed based structures for e-commerce accounts that can adapt automatically as products get added or removed going forward. This kind of rebuild takes real planning to avoid losing the historical performance data and learnings tied to the old structure.
Restructuring an account around a catalog that has genuinely outgrown its original organization is exactly the kind of project that benefits from outside expertise. BSC rebuilds campaign architecture to match where a catalog actually is today, not where it was when the account was first set up.
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