Shopping Campaign Overlap and a Starved Smart Shopping Budget
Tailspin Outdoor sells 12,000 SKUs on Microsoft Shopping. The account runs a High-priority clearance campaign, a Medium-priority all-products campaign, a Low-priority accessories campaign, and a Smart Shopping campaign launched six weeks ago with a $4,000 monthly budget and a 500% ROAS target. Smart Shopping has spent $2,380 and returned 410% ROAS. The standard campaigns report 620% blended ROAS, but brand search is a separate campaign and Shopping search terms overlap heavily with brand queries. Feed diagnostics show 900 SKUs disapproved for missing GTIN, 1,400 missing brand, and 300 with image issues. The High-priority clearance campaign holds only 60 SKUs but receives 38% of Shopping impressions. The team wants to raise Smart Shopping's budget to $8,000 and pause the Medium campaign.
1. Diagnose why Smart Shopping is underspending and whether raising its budget is the right move.
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Smart Shopping is likely underspending because its 500% target ROAS is above the 410% it can actually achieve on the available, approved product set. Raising the budget to $8,000 will not force delivery if the algorithm cannot find conversions at the target; it may simply continue to underspend or relax efficiency. The 410% result also suggests the target is unrealistic for this inventory mix, not that the campaign needs more money. The standard campaigns' 620% blended ROAS is not a fair comparison: it includes brand-overlap queries and a High-priority clearance campaign with only 60 SKUs taking 38% of impressions, which skews the mix toward low-price, high-conversion items. Before changing budget, remove brand queries from Shopping reporting, segment by product group, and fix the 900 GTIN and 1,400 brand disapprovals. A better test is to keep Smart Shopping at $4,000, lower its target to 450%, and compare like-for-like product groups against standard. Do not pause Medium yet; that would remove the control.
2. Recommend changes to campaign priority, feed, and brand overlap, with a measurement plan.
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Use priority deliberately: High priority only for a true clearance campaign with its own budget and a defined end date; Medium for core products; Low for accessories only if margin justifies it. The 60-SKU clearance campaign should not receive 38% of impressions unless those products are the strategic focus. Fix feed errors first: GTIN, brand, image, and availability; disapproved SKUs cannot serve. Add brand keywords as negatives in Shopping campaigns or use a brand-exclusion strategy so Shopping does not claim branded search credit. Measurement: run a 30-day pre/post with product-group-level ROAS, margin, new-customer rate, and impression share. Compare Smart Shopping against standard on the same approved SKUs. Set a rule: if Smart Shopping cannot hit 450% at $4,000 for two weeks after feed fixes, keep it as a limited always-on campaign rather than scaling. Only raise budget after feed health is above 95% and incremental margin is positive.