Two zero-order terms. Same spend. Same campaign. Same week.

One gets Add Negative. The other gets Review listing — protected core keyword.

Same dashboard. Different diagnosis. That's the Protect tab — and it's why blanket negation rules destroy accounts.

Protect vs. optimize: same symptom, different disease

Optimize asks: "Should this traffic stop?"

Protect asks: "Is something we must keep failing to convert — and why?"

When a term matches your catalog, your brand, or a deliberate exact target, zero orders usually mean:

Buy Box loss or suppression
Price or coupon mismatch
Review velocity drop
Image or variation confusion
Inventory stockout

Cutting the keyword hides the problem. Fixing the offer fixes every keyword on that ASIN.

Protected keywords: explicit "do not block"

Some terms are strategically non-negotiable — your brand name, core category head terms, hero product descriptors.

Define them in Ad Insights → Settings → Protected keywords.

Protected terms with clicks and zero orders never receive negative-keyword recommendations. They surface in Protect as Core Keyword Signals — with spend, click history, and a listing/pricing review path.

For agencies: this gives you audit-ready rationale when a client asks why you didn't negate "their main keyword."

Hero exact keywords: never negate your own target

If you're bidding exact match on "gold hoop earrings" in a Hero campaign, a zero-order week on that search term is not irrelevant traffic. It's your target failing to convert.

Simentri applies an exact keyword guard:

Below the exact keyword click floor (default 20) → Watching, not enough data
Above the floor with zero orders → Review listing + optional Lower Bid to stop bleed
Never Add Negative on the hero exact phrase in the same ad group

Buy Box and inventory: ads amplify broken offers

Buy Box percentage below threshold triggers Protect-level review. Running ads when you don't reliably win the Buy Box is paying to send shoppers to a competitor's offer.

Simentri also watches account-level CVR decay — when conversion trends down week over week, Grow recommendations suppress until Protect-level issues resolve. Scaling into a broken conversion funnel is how ACOS "mysteriously" breaks after a good month.

On the Summary tab, the Product Conversion Watchlist (Top ASIN CVR) flags ASINs where multiple keywords fail together — a strong signal the listing is the problem, not individual terms.

Own-ASIN leaks and brand defense

Your ASIN appearing as a product target in a non-defensive prospecting campaign is structural waste — you're paying to intercept your own traffic.

These surface under Protect or structural findings with a Review path: consolidate brand defense, remove redundant targets, align campaign intent.

Brand defense isn't just "bid on your brand name." It's impression share on terms where competitors conquest — and keeping your own catalog from competing against itself.

When protect blocks grow

The Grow tab checks account health before bid or budget increases:

CVR decay active → scale suppressed; candidates may move to Watching
Buy Box risk → grow safety gate
Dead product targets on converting campaigns → optimize review before scale on that campaign

Sequence matters: Protect before Grow isn't bureaucracy. It's preventing you from pouring gasoline on a conversion problem.

What to do this week

Add protected keywords — brand + top 5–10 category terms you never auto-negate
Check Buy Box % on advertised ASINs before any Grow actions
Open Protect tab after Optimize — don't skip it when badge count is zero; scan Summary watchlist anyway
Hero exact failures → listing audit first, negate never

The bottom line

Protect is where good PPC managers earn trust — by not killing strategic traffic when the offer is broken.

Simentri separates block from defend with rules, safelists, and ASIN-level distress detection — so your core terms survive a bad week.

90-day free trial, no credit card required. You approve every action before anything changes in Seller Central.

Start your free audit →

Protect: Defend Brand Terms, Hero Keywords, and Buy Box Before You Grow