To add keywords in Amazon Ads, open your campaign dashboard, select the specific ad group, click the Keywords tab, and enter search terms that match what readers type when looking for books like yours. Choose between broad, phrase, or exact match types to control how closely a shopper’s search must match your chosen terms.
Why Keyword Selection Matters for KDP Books
Amazon Ads operates on a search-first model. When a reader types a query into the search bar, Amazon matches that query against the keywords you have selected for your ad group. If your keywords are too vague, you pay for clicks from people who aren’t interested in your genre. If they are too narrow, you miss out on volume. The goal is to find the sweet spot where high-intent readers find your book quickly.
For Kindle Direct Publishing authors, this is critical because organic search rankings and paid ads often overlap. A well-chosen keyword reinforces your book’s visibility in organic results while ensuring your sponsored ads appear alongside them. Poor keyword choices drain your budget on irrelevant clicks, leaving less money for high-converting traffic.
Step-by-Step: Adding Keywords to Your Amazon Campaign
The process is straightforward once you are inside the Amazon Ads console. Here is the exact workflow for adding keywords to an existing or new campaign.
- Log in to your Amazon Ads account and navigate to Campaigns.
- Select the campaign you want to edit, then click on the specific Ad Group within that campaign.
- Click the Keywords tab.
- Click Add Keywords. You will see a field to enter terms and a dropdown for match types.
- Enter your chosen terms. For example, if you are selling a cookbook, you might enter
quick healthy dinners. - Select a match type (Broad, Phrase, or Exact) from the dropdown next to each keyword.
- Click Save.
It is helpful to group related keywords together. If you have a series of mystery novels, keep mystery-specific keywords in one ad group and general fiction keywords in another. This prevents your budget from being diluted by less relevant searches.
Matching Reader Intent with Broad, Narrow, and Exact Terms
Amazon offers three match types. Understanding the difference between them prevents wasted spend.
| Match Type | Behavior | Best Use Case |
|---|---|---|
| Broad | Shows your ad for searches close to your keyword, including variations and synonyms. | Discovering new search terms and capturing high volume. |
| Phrase | Shows your ad if the search contains your keyword phrase in order, with words before or after allowed. | Balancing relevance and volume for specific genre terms. |
| Exact | Shows your ad only if the search matches your keyword exactly (or is very close). | Maximizing conversion rates for known high-performing terms. |
Consider a romance author selling a book titled Midnight in Paris.
If they choose Broad match for Paris romance, their ad might show for searches like romantic Paris vacation guide or best cafes in Paris. This generates clicks, but many may not buy a novel.
If they choose Phrase match for Paris romance, the ad shows for light Paris romance novel or best Paris romance. The intent is clearer.
If they choose Exact match for Paris romance, the ad shows primarily for the exact phrase Paris romance or very minor variations like Paris romance . This usually yields the highest conversion rate because the searcher is specifically looking for that niche.
Most successful KDP campaigns start with Broad match to gather data, then move high-performing search terms to Exact match to control costs and improve efficiency.
Using KDPAdBoost to Generate Unique Keyword Sets
Manual keyword research can be time-consuming, especially when you need to differentiate between multiple titles in a series or across different genres. Instead of guessing which terms resonate with readers, you can use automated tools to generate targeted sets based on your book’s metadata.
KDPAdBoost is designed specifically for this workflow. You paste your book title and a few key details into the interface. The Keyword Set Engine then produces targeted keyword sets that match reader intent. It generates unique combinations of broad, narrow, and exact match terms tailored to your specific niche.
For example, if a romance author inputs their title Midnight in Paris, the tool generates a unique keyword set including Paris romance novel, light contemporary romance, and short love story. The author copies these directly into Amazon Ads, avoiding manual research time. Because the sets are generated fresh from the title’s specific niche, you avoid recycled templates that dilute campaign performance. This ensures that every keyword you paste into Amazon Ads is optimized for the specific audience likely to buy that particular book.
Testing and Refining Your Keyword Performance
Adding keywords is not a one-time task. Amazon Ads provides performance data that tells you which keywords are working. You should review this data after your campaign has run for at least one to two weeks, depending on your daily budget.
Look at the Click-Through Rate (CTR) and Conversion Rate for each keyword.
- High CTR, Low Conversion: Your ad is attracting clicks, but the landing page or book description isn’t convincing them to buy. Check if your keyword promises something the book doesn’t deliver.
- Low CTR, High Conversion: Your ad is relevant to those who click, but few people are seeing it. Consider increasing your bid slightly or adding broader variations of this keyword.
- Low CTR, Low Conversion: The keyword is likely irrelevant. Pause it and try a different term.
A common strategy is to start with a Broad match keyword. After two weeks, identify the search terms that actually converted into sales. Take those specific search terms and add them as Exact match keywords in a separate ad group. Then, exclude those terms from the original Broad match group. This gives you precise control over your bids for proven performers while still using Broad match to discover new opportunities.
Common Mistakes to Avoid
Several simple errors can hurt your campaign performance.
First, avoid using too many single-word keywords. Terms like romance or mystery are extremely competitive and often attract browsers rather than buyers. Multi-word phrases like light contemporary romance tend to convert better because the searcher has more specific intent.
Second, do not ignore negative keywords. If you notice your ad showing up for irrelevant searches, such as free Kindle books when you sell a paid novel, add free as a negative keyword. This prevents your budget from being spent on clicks that rarely convert.
Finally, ensure your keywords match the actual content of your book. If your book is a short story collection, targeting full length novel might get clicks, but those readers will likely leave quickly when they see the book is shorter than expected. Aligning your keywords with your book’s format and genre ensures that the traffic you pay for is genuinely interested in your work.