Keyword Research for Ecommerce Sites
Why Ecommerce Keyword Research Is Different
Most keyword research guides are written for bloggers and service businesses. Ecommerce keyword research has unique requirements because you are mapping keywords across multiple page types: product pages, category pages, brand pages, and content pages. Each page type serves a different search intent, and the keywords you target on a product page look very different from the ones you target in a buying guide.
The other major difference is that ecommerce keywords have measurable revenue potential. You can estimate the value of ranking for any keyword by multiplying search volume by expected click-through rate by your conversion rate by your average order value. A keyword with 5,000 monthly searches that leads to product purchases is often worth more than a keyword with 50,000 searches that attracts informational browsers who never buy.
Step-by-Step Keyword Research Process
Start with what you actually sell. Open your product catalog and list every product type, category, subcategory, brand, material, feature, and use case. If you sell cookware, your seed list includes "cast iron skillet," "stainless steel pan," "nonstick cookware set," "Dutch oven," "ceramic baking dish," and dozens more. Add the modifiers customers use when shopping: "best," "cheap," "professional," "for beginners," brand names, sizes, and colors. This initial list of 50 to 200 seed keywords forms the foundation for everything that follows.
Take your seed keywords and run them through research tools to discover related terms and get search volume data. Google Keyword Planner (free with a Google Ads account) shows search volume ranges and related keyword suggestions. Google Autocomplete shows what people actually search by typing your seed keyword and noting the suggestions. Google's "People also ask" and "Related searches" sections at the bottom of search results reveal additional keyword ideas. For paid tools, Ahrefs Keywords Explorer and Semrush Keyword Magic Tool provide exact search volumes, keyword difficulty scores, click-through rate estimates, and thousands of related keyword suggestions from a single seed term. Each seed keyword typically expands to 20 to 50 useful variations.
Search intent is what the person actually wants when they type a query. For ecommerce, there are four intent types that matter. Transactional intent means ready to buy: "buy cast iron skillet," "Lodge cast iron skillet price," "12 inch skillet free shipping." These go to product pages. Commercial investigation means comparing options: "best cast iron skillet," "Lodge vs Le Creuset skillet," "cast iron skillet reviews." These go to comparison content or category pages. Informational intent means learning: "how to season cast iron skillet," "can you use soap on cast iron." These go to blog articles. Navigational intent means looking for a specific brand or site: "Lodge cast iron website," "Amazon cast iron skillet." The simplest way to check intent is to Google the keyword yourself and see what type of content ranks on page one. If Google shows product pages, the intent is transactional. If it shows blog posts, the intent is informational.
Not every keyword is worth pursuing. A brand new store cannot realistically rank for "cast iron skillet" (a keyword dominated by Amazon, Lodge, and major retailers with enormous authority). But it can rank for "best cast iron skillet for glass top stove" or "handmade cast iron skillet small batch." Keyword difficulty scores in tools like Ahrefs (0-100 scale) estimate how hard it is to rank based on the backlink profiles of current top results. New stores should focus on keywords with difficulty scores under 30 and gradually work up to more competitive terms as their authority grows. Also look at the actual search results: if the top 10 results are all major retailers, the keyword is likely too competitive. If you see niche blogs, forums, or smaller stores ranking, there is an opening.
Create a spreadsheet with columns for keyword, search volume, difficulty, intent, and assigned page URL. Every keyword gets mapped to exactly one page on your store. Your homepage targets your broadest terms (your brand name plus your main product category). Category pages target mid-level terms ("cast iron cookware," "stainless steel pots and pans"). Product pages target specific terms including model names and specifications. Blog posts target informational keywords. The golden rule is one primary keyword per page. When two pages target the same keyword, they compete with each other (keyword cannibalization), and Google often ranks neither well. If you find two pages targeting the same keyword, consolidate them or differentiate their target keywords.
You cannot optimize every page at once, so prioritize. Score each keyword on three factors: search volume (how many people search for it), conversion potential (how likely the searcher is to buy), and competitiveness (how realistic it is that you can rank). A keyword with 500 monthly searches and high buying intent is often more valuable than one with 10,000 searches and purely informational intent. Start with your highest-margin product categories, the keywords closest to a purchase decision, and the terms where you have the best chance of reaching page one within 3 to 6 months.
Finding Keywords Your Competitors Miss
Competitor analysis is one of the fastest ways to build a comprehensive keyword list. Enter a competitor's domain into Ahrefs or Semrush to see every keyword they rank for, sorted by traffic volume. Filter for keywords where they rank on page one, since these are proven to drive traffic in your niche. Then look for gaps: keywords where competitors rank but you do not have a page targeting that term at all.
The most valuable discoveries are keywords where multiple competitors rank but nobody ranks well. If the top results for a keyword all have weak content, low authority, or poor user experience, that is an opportunity to create something better and claim that traffic. Also look at competitor blog content. The topics they write about reveal the informational keywords that drive traffic in your niche, and you can often create more comprehensive, better-optimized versions.
Long-Tail Keywords: Where New Stores Win
Long-tail keywords are longer, more specific search phrases that individually have lower volume but collectively represent the majority of all searches. "Cast iron skillet" gets 135,000 searches per month and is nearly impossible for a new store to rank for. But "best cast iron skillet for induction cooktop under $100" gets 320 searches per month, has much lower competition, and the searcher is clearly ready to buy a specific product.
New ecommerce stores should build their SEO strategy around long-tail keywords first. Target 50 to 100 specific, lower-competition terms rather than chasing 5 to 10 high-volume terms you cannot win. As you build authority and earn backlinks over 6 to 12 months, you will naturally start ranking for the shorter, more competitive versions of those keywords as well.
Great sources for long-tail ecommerce keywords include Amazon search suggestions (type your product keyword and note what Amazon suggests), Google's "People also ask" boxes, customer reviews (the language customers use to describe products), and forum discussions on Reddit and niche communities where people ask product questions.
Keyword Research Tools Comparison
Free tools: Google Keyword Planner gives search volume ranges and keyword ideas but requires a Google Ads account. Google Search Console shows which keywords already bring traffic to your site. Google Trends shows keyword popularity over time and seasonal patterns. AnswerThePublic generates question-based keyword ideas. Ubersuggest offers limited free keyword data.
Paid tools: Ahrefs ($99/month and up) provides the most comprehensive keyword database, accurate difficulty scores, competitor analysis, and content gap identification. Semrush ($130/month and up) offers similar features plus advertising data and social media tools. Moz ($99/month and up) is more beginner-friendly with less overwhelming data. For most ecommerce stores, one paid tool combined with the free Google tools provides everything you need.
If your budget does not allow a paid tool yet, you can accomplish 80% of effective keyword research using Google Keyword Planner, Google Autocomplete, Google Search Console, and manual competitor analysis by studying search results. The paid tools make the process faster and more data-driven, but they are not strictly required to get started. Check our SEO tools guide for detailed comparisons.
Maintaining Your Keyword Strategy
Keyword research is not a one-time project. Review and update your keyword map quarterly. Check Search Console for keywords you are ranking for that you did not target intentionally, since these reveal new optimization opportunities. Monitor ranking changes to catch drops early. Add new keywords when you launch new products or categories. Remove keywords from your plan if they consistently prove too competitive or too low in volume to justify the effort.
As your store grows, revisit the competitive keywords you initially skipped. Once you have built authority through long-tail wins, link building, and consistent content creation, the medium-difficulty keywords that were unreachable at launch become realistic targets. SEO is an incremental process, and your keyword strategy should evolve as your site's authority grows.