Brand Defense vs. Category Expansion Budget Split
A mid-size brand sells a $25 consumable with a 45% repeat-purchase rate. Total monthly ad budget is $10,000 across Sponsored Products, Sponsored Brands, and Sponsored Display. Currently 70% of spend is on branded keywords (the brand name and misspellings), which run at 12% ACOS. The remaining 30% is on non-branded category keywords at 48% ACOS. Blended ACOS is 23%. Leadership wants to cut the branded spend because "we already own our brand" and shift everything to category terms to grow. A competitor recently started bidding on the brand's name and is appearing in the top slot on roughly 30% of branded searches.
1. Evaluate leadership's proposal. What is wrong with the reasoning, and what does the 12% branded ACOS actually represent?
Read the worked answer
Leadership is conflating low ACOS with low value. The branded campaign's 12% ACOS is not wasted spend - it is defensive spend with a high conversion rate and a low cost per acquisition, and it is protecting a customer base with a 45% repeat rate.
Key points:
- Branded search is the bottom of the funnel. People searching the brand name are pre-qualified. Cutting branded spend doesn't create category demand; it hands those clicks to the competitor already winning 30% of branded top slots.
- The 48% category ACOS is the growth engine, but it is not comparable. Non-branded terms are discovery - they carry a higher CAC because they build new-customer acquisition. Judging them against a 12% branded ACOS is an apples-to-oranges comparison.
- Blended 23% masks the mix. If you cut branded spend, blended ACOS will rise even if total sales are flat, because the cheap-converting share shrinks. That will look like failure even if the strategy is sound.
- Repeat rate changes the math. A $25 consumable with 45% repeat means the true LTV of a branded click is far above the first-order ACOS. First-order ACOS understates branded ROI.
So the proposal is directionally risky: it removes a moat while a competitor is actively attacking it.
2. Propose a revised budget allocation and the measurement approach to prove it is working.
Read the worked answer
Allocation (monthly $10,000):
- Brand defense: $3,000 (30%). Down from 70%, but not zero. Keep exact brand and misspellings; drop broad brand match and generic brand-adjacent terms that leak. Objective: hold top-of-page share on brand ≥70% and keep branded ACOS ≤15%.
- Category expansion: $5,000 (50%). Non-branded Sponsored Products + Sponsored Brands on high-intent category terms. Accept a higher ACOS (target 40-45%) but gate on new-to-brand (NTB) percentage - if NTB is high, the higher ACOS is buying future repeat revenue.
- Sponsored Display retargeting/competitor conquest: $2,000 (20%). Retarget product-page viewers and cart abandoners; test competitor ASIN targeting. Display is cheap reach and can capture the 30% of branded searchers the competitor is intercepting.
Measurement approach:
- Track branded impression share and top-of-search share weekly - the leading indicator of defense success.
- Report NTB orders and NTB sales separately for category spend, not just ACOS.
- Use a holdout or geo split if possible: pause category spend in one region for 2 weeks and compare total sales, to estimate incrementality rather than attributing all category sales to ads.
- Evaluate on a 90-day cohort basis (first order + repeat), since a 45% repeat rate means first-order ACOS misjudges category spend.
Guardrail: if branded impression share drops below 60% or branded ACOS exceeds 18%, reallocate back toward defense.