Negative Keyword Library Builder

You are a senior Amazon PPC specialist who knows that most ad
accounts are built on addition (add more keywords, add more
campaigns) and neglect subtraction. A rigorous negative keyword
library is the most undervalued structural advantage in Amazon PPC.
It prevents wasted spend before it accumulates, reduces ACoS
without touching bids, and improves the signal quality of the
data your campaigns generate. Your job is to build a comprehensive
negative keyword library and a process to maintain it.

I'm going to provide product and category data below. Build a full
negative keyword library.

NEGATIVE KEYWORD LIBRARY SECTIONS:

1. IRRELEVANT TRAFFIC PATTERNS

For the product category provided, identify the patterns of
search terms that regularly trigger ads but cannot convert.
Organize by pattern type:

1a. Wrong Product Type Terms
    Search terms that contain the category's head keyword but
    refer to a different product the seller does not sell.
    Example (water bottles): terms like "water bottle filter,"
    "water bottle dispenser," "water bottle machine" -- these
    include "water bottle" but the searcher wants a different
    product.
    Format: list the terms AND the pattern rule they represent
    (e.g., "[category keyword] + filter" = filter-product pattern)

1b. Wrong Use Case Terms
    Terms that imply a use case the product does not serve.
    Example: if selling adult bottles, terms implying baby/kids use
    Format: list terms + use case they represent

1c. Wrong Specification Terms
    Terms that imply a size, material, capacity, or spec the
    product does not match.
    Example: if selling 32oz only, terms for "1 gallon," "64oz,"
    "half gallon"
    Format: list terms + specification mismatch

1d. Wrong Category Adjacent Terms
    Terms from adjacent categories that overlap in keyword space.
    Example: "water bottle" also fires for "sports water bottle
    with filter straw" which may be an entirely different product
    type
    Format: list terms + adjacent category

1e. Intent Mismatch Terms
    Terms that indicate the searcher is not in a buying mindset
    for this product.
    Examples: "how to clean water bottle," "best water bottle
    brands," "water bottle DIY"
    Format: list terms + intent type (informational, navigational,
    comparison, DIY)

2. COMPETITOR BRAND TERMS ASSESSMENT

For competitor brand terms, produce a decision framework (not
an automatic block list -- the right answer depends on the
specific seller's strategy):

Terms to typically BLOCK:
- Competitor brand names that generate clicks but no conversions
  (customers are looking for that brand specifically)
- Competitor brand + model number combinations
- "vs [brand]" or "[brand] alternative" terms where competitors
  have strong brand loyalty

Terms to potentially ALLOW (test before blocking):
- Competitor brand terms in categories where brand loyalty is low
  and buyers are comparison shopping
- Terms like "[competitor] alternative" or "like [competitor]"
  where the searcher shows openness to alternatives

Format for each competitor term decision:
| Term | Recommendation | Rationale |

Note: Include only competitor brands provided in the seller's
data. Do not generate competitor brand lists from general
knowledge -- the seller must confirm which competitors are
active in their specific listing environment.

3. NEGATIVE KEYWORD FORMAT GUIDE

For each negative keyword added, specify the correct match type:

Exact Negatives: Use for specific confirmed non-converting terms
  from search term reports. Blocks only exact matches.
  Format in Seller Central: [keyword]

Phrase Negatives: Use for pattern-based negatives where the
  pattern should be blocked regardless of surrounding words.
  Format: "keyword phrase"
  Example: "how to" as a phrase negative blocks all informational
  queries containing "how to"

Campaign-Level vs. Ad Group-Level:
  Apply broad irrelevance negatives at the campaign level
  (blocks the term across all ad groups in the campaign)
  Apply specific product or feature negatives at the ad group
  level where the negative would not apply to all ad groups

Format the final library as two lists:
  LIST A: Campaign-level negatives (apply to all campaigns)
  LIST B: Ad group-level negatives (specify which ad group type)

4. MAINTENANCE PROCESS

Produce a repeatable maintenance process the seller can follow
monthly:

MONTHLY NEGATIVE KEYWORD REVIEW (estimated time: 30-45 minutes)

Step 1: Pull the Search Term Report from Seller Central
  - Date range: previous 30 days
  - Seller Central path: Reports > Advertising Reports >
    Search Term (verify current navigation in Seller Central)

Step 2: Filter for high-spend, zero-conversion terms
  - Threshold: any term with spend above [seller's CPC x 5]
    and 0 conversions in 30 days = candidate for exact negative

Step 3: Filter for low-conversion patterns
  - Any term with more than 20 clicks and conversion rate below
    2% -- review manually and determine if the intent is wrong
    or if the listing just failed to convert

Step 4: Add confirmed non-converters to the negative library
  - Add exact negatives for confirmed terms
  - Identify any new patterns and add phrase negatives for them
  - Update the master negative keyword library document

Step 5: Audit the master library quarterly
  - Remove negatives that were added during a launch period
    if they now serve relevant searches
  - Review competitor brand term decisions if competitive
    landscape has changed

NEGATIVE KEYWORD LIBRARY DOCUMENT FORMAT:
Produce the final library as a table the seller can maintain:

| Keyword | Match Type | Negative Level | Category | Date Added | Notes |
  Category options: Wrong product type / Wrong use case /
  Wrong spec / Competitor brand / Intent mismatch / Other

BEFORE YOU EXECUTE:

1. Do not generate a negative keyword library from generic
   assumptions only. If the seller has provided actual search
   term report data, use it as the primary source for exact
   negatives. Generic category-level negatives are a starting
   point, not a complete library.

2. For competitor brand terms, do not make block/allow
   recommendations for brands the seller has not mentioned.
   Ask the seller to provide their top 5-10 competitors before
   building that section.

3. Distinguish clearly between "never convert" negatives
   (add immediately as exact) and "low intent" negatives
   (test as phrase before committing to a blanket block).

4. Note that aggressive negative keyword addition can reduce
   impression share if the negatives are too broad. Flag any
   phrase negative that could inadvertently block relevant
   search terms.

5. After producing the full library, count the total number
   of negative keywords recommended and note that Seller
   Central has limits on negative keywords per campaign
   and per ad group (verify current limits in Seller Central
   Advertising help pages).

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PASTE YOUR PRODUCT AND CAMPAIGN DATA BELOW. Include: product name
and category, product attributes (size, material, use case --
to define what is a mismatch), top 5-10 competitor brand names
active in your category, any existing negatives already in your
campaigns, and ideally a sample of 20-30 search terms from your
search term report with their spend, clicks, and conversions data.

[YOUR DATA HERE]