The N-Gram Analyzer in Adbrew is a powerful tool designed to help Amazon advertisers deconstruct and analyze search terms by breaking them down into sequences of N words (or N-grams). This breakdown provides deep insights into the specific phrases and keyword patterns that influence customer searches for your products, allowing for a data-driven approach to keyword optimization and ad spend efficiency.
Types of N-Grams
The N-Gram Analyzer lets users split search terms into different N-grams, such as:
Unigram (1-gram): Single words, e.g., “coffee,” “powder.”
Bigram (2-gram): Two-word sequences, e.g., “hazelnut coffee.”
Trigram (3-gram): Three-word sequences, e.g., “hazelnut coffee powder.”
Four-gram (4-gram): Four-word sequences, e.g., “hazelnut coffee powder sachet.”
Increasing the N-gram length helps reveal longer, more specific phrases, uncovering long-tail keyword opportunities.
Using the N-Gram Analyzer in Adbrew:
1. Accessing N-Gram: Navigate to Analytics > N-grams from the sidebar menu.
2. Selecting N-Gram Type: Choose between unigrams, bigrams, trigrams, etc. As you increase the N-gram value, you'll discover more long-tail and less competitive keyword targets.
3. Applying Filters: Narrow down your N-gram list by applying filters such as Orders, Clicks, ACOS, etc. This helps you focus on specific aspects of keyword performance.
Key Use Cases
1. Add Low-Performing Search Terms as Negative Keywords
This 2-gram analysis report for a fashion & apparel brand shows that whenever the phrase "5-inc" appeared in a search term, it consistently had a higher ACOS than the target ACOS. Adding this keyword as a negative phrase would prevent ads from triggering on any phrase containing "5-inc" and reduce wasted ad spend for the brand.
Would it have been possible to identify this trend just by looking at the search term report for this brand? Probably not, because this search term received clicks from 130 different ad groups, and in 90% of cases, each ad group had fewer than 5–10 clicks. This makes it difficult to recognize patterns when examined individually.
2. Find New Targeting Opportunities
Similarly, let's say we’re examining a 3-gram report for the same brand and notice that the phrase "wombie tanker jacket" is driving sales at a much lower ACOS than the target.
When we go to the "Target Analyzer" page and use the filter to see if this keyword is present in any campaign, it’s missing. This indicates that the brand could start targeting this phrase in a phrase match to capture more impressions and sales.
Tip: To identify high-performing keywords, use higher N-grams (such as 3-gram or 4-gram) for more specific, long-tail opportunities.
Adding negative or positive keywords from the N-gram page is straightforward—simply select the keyword and click "Action" to add it as a positive or negative keyword.
