SEO & AI search playbook for marketplaces

Searches to plan around

Query patterns and the intent behind them. We don’t quote search volumes: check your own Search Console for the ones you already appear for.

• “[item] for sale [location]”, “used [item]”

  Browse inventory

  Category × location pages, only where you have listings.

• “[specific model or item]”

  Find one thing

  Listing pages rank for specific items while they're live.

• “[item] price”, “how much is [item] worth”

  Valuation

  Price guides from your own sold data can be unique content, if you have enough data.

• “sell [item] online”

  Supply side

  Seller acquisition queries. A clear “how selling works” page per category helps.

Page families that work

• Category × location pages

  /bikes/berlin

  Only when there are enough live listings to be useful. Add local context: typical prices, popular brands, from your own data.

• Price guides

  /price-guide/[model]

  Built from your sold data, with the sample size and period.

• Seller guides by category

  /sell/bikes

  Fees, what sells, how to photograph and price. Distinct per category.

Risky page types

• Empty category × location pages

  A page with zero listings is a soft 404 at best. Google's faceted navigation guide suggests returning 404 when a filter combination has no results.

• Internal search results indexed

  Free-text search URLs create unbounded near-duplicate pages. Keep them out of the index.

• Unmoderated listings

  Spam listings are user-generated spam on your site. Moderation is an SEO issue, not just a trust issue.

Technical pitfalls

1. 1

   Expired listings

   Decide a rule: keep sold listings live with “sold” and similar items if they have links or traffic, and return 404 or 410 for the rest. Google's crawl budget guide recommends 404/410 for permanently removed pages.

2. 2

   Crawl spent on filters and sort orders

   Sort, view and filter parameters multiply URLs. Block those you don't need indexed and keep parameter order consistent.

3. 3

   User links in listings

   Mark links in user content with rel="ugc" or nofollow, as Google's link guidance recommends.

How AI assistants answer questions in this category

Assistants aren't good at live inventory, so “find me a used road bike in Berlin” usually leads to a link to a marketplace search rather than specific listings. Where marketplaces get cited is price and market questions (“what does a used [model] sell for?”) when they publish data-backed price guides, and seller questions about fees and how selling works.

What tends to earn a citation

• Price guides with sample size, time period and method.
• Clear fee pages for sellers.
• Category pages that explain the market in a sentence or two before the listings.

Check whether the AI crawlers you want can reach your site with our AI crawler checker.

Where links come from

• Data and price reports

  Journalists and communities link to price trends backed by real sales data.

• Seller communities

  Hobby and trade communities share seller guides that are genuinely useful.

• Marketplace directories

  A few marketplace directories list new marketplaces; they matter less than supply-side communities.

A 90-day plan

1. Days 1–30

   Crawl control

   • –Map every URL pattern the site generates.
   • –Block or noindex internal search, sort and view parameters.
   • –Set the rule for empty pages and expired listings.

2. Days 31–60

   Useful category pages

   • –Set a minimum listing count for indexable category × location pages.
   • –Add intros from your own data to top categories.
   • –Mark user links as ugc.

3. Days 61–90

   Data and supply

   • –Publish price guides where you have enough sales data.
   • –Write seller guides for your top categories.
   • –Check the Page indexing report for crawled-not-indexed category pages.

What to watch in Search Console

The Performance report gives clicks, impressions, CTR and average position by query, page, country, device and date. Traffic from Google's AI features is counted there too, under the Web search type (Google).

Indexed category pages vs total

The Page indexing report shows whether your minimum-listings rule is working.

Crawl stats by response code

A rising share of 404s is fine after cleanup; a rising share of 200s on parameter URLs isn't.

Supply-side queries

“sell [item]” impressions show whether you're growing sellers, not just buyers.

Frequently asked questions

Sources

Checked on September 23, 2026. Search patterns and page advice are our own judgement from running this playbook; we don’t quote search volumes or third-party statistics.

1. Google Search Central: Managing crawling of faceted navigation URLs
2. Google Search Central: Spam policies for Google web search
3. Google Search Central: Crawl budget management for large sites
4. Google Search Central: Qualify your outbound links
5. Google Search Central: AI features and your website
6. Search Console Help: Performance report