How does eBay's Cassini search engine work?

Cassini ranks listings based on three main factors: relevance (how well your title and item specifics match the search query), seller performance (defect rate, shipping speed, return policy), and listing quality (photos, description completeness, item specifics). Unlike Amazon, eBay also considers listing format, price competitiveness, and buyer engagement metrics like click-through rate.

What are the most important eBay SEO ranking factors?

The top factors are: 1) Title keyword relevance, 2) Complete item specifics, 3) Seller performance standards (Top Rated Seller status), 4) Competitive pricing with free shipping, 5) High-quality images, 6) Sales history and conversion rate, and 7) Promoted Listings boost. Item specifics have become increasingly important in recent years.

How do I become a Top Rated Seller on eBay?

Requirements include: 100+ transactions and $1,000+ in sales over the past 12 months, defect rate below 0.5%, late shipment rate below 3%, and valid tracking uploaded for 95%+ of transactions. Top Rated Plus benefits (20% discount on final value fees) require 1-day handling and 30-day returns.

Does eBay SEO differ across European eBay sites?

The Cassini algorithm is consistent across eBay sites, but keyword strategy must be localized. eBay.de requires German titles and item specifics, eBay.fr requires French, and so on. Search volumes and competition levels also vary significantly between markets. Tools like Marqetir can generate optimized listings for each European eBay marketplace.

Should I use auction or fixed-price format for eBay SEO?

Fixed-price with Good Till Cancelled (GTC) format is best for SEO. GTC listings accumulate sales history and ranking signals over time, while auction listings expire after 7–10 days and you start from scratch. Use auctions only for rare, collectible, or one-of-a-kind items where competitive bidding drives the price up.

eBay SEO Guide: How to Rank Higher on eBay

Master eBay's Cassini search engine — optimization strategies and tools for 2026

eBay's Cassini search engine determines which listings appear when buyers search on eBay. Unlike Amazon, eBay's algorithm places heavy emphasis on listing quality, item specifics completeness, seller performance standards, and buyer engagement metrics. Understanding Cassini is essential for visibility on eBay's 1.3 billion live listings.

In 2026, eBay has doubled down on structured data and item specifics as ranking signals. Listings with complete item specifics rank significantly higher than those with minimal attributes. eBay's promoted listings program has also become a key part of the SEO equation, blending organic and paid visibility in search results.

This guide covers the most impactful eBay SEO strategies, from title optimization and item specifics to seller performance and promoted listings. These techniques apply to all European eBay sites including eBay.co.uk, eBay.de, eBay.fr, eBay.it, and eBay.es.

The Ranking

Title Optimization

📝On-Page

Visitors: N/AFees: Impact: CriticalBest for: The most important eBay SEO factor

Use all 80 characters — every word is a potential search match
Front-load the most important keywords
Include brand, model, size, color, condition, and material
Avoid filler words like "WOW", "L@@K", or excessive punctuation

Item Specifics & Structured Data

📋On-Page

Visitors: N/AFees: Impact: CriticalBest for: Cassini heavily weighs complete item specifics

Fill in ALL available item specifics — not just required ones
Complete item specifics can improve ranking by 20–30%
Item specifics power eBay's faceted search filters
Add custom item specifics for attributes eBay doesn't suggest

Category Selection

🗂️Foundation

Visitors: N/AFees: Impact: HighBest for: Wrong category = invisible to filtered searches

Choose the most specific leaf category available
Use eBay's category suggestion tool for guidance
Consider listing in two categories for high-value items
Category determines which item specifics are available

Product Images

📸Conversion

Visitors: N/AFees: Impact: HighBest for: Better images = higher click-through and conversion

Use 12 images (eBay allows up to 24 free photos)
First image is critical — clean background, full product visible
Show multiple angles, close-ups, and scale reference
Avoid stock photos — real product photos build trust

Seller Performance Standards

⭐Account

Visitors: N/AFees: Impact: Very HighBest for: Top Rated Seller status boosts search ranking

Top Rated Seller badge increases search visibility
Maintain defect rate below 0.5% and late shipment below 3%
Offer 30-day returns for Top Rated Plus benefits
Same-day or 1-day handling time improves ranking

Pricing & Best Offer Strategy

💰Conversion

Visitors: N/AFees: Impact: HighBest for: Competitive pricing drives sales velocity

Research competitor prices using eBay's Terapeak tool
Enable Best Offer to capture price-sensitive buyers
Free shipping improves search ranking on eBay
Use volume pricing for multi-quantity listings

Promoted Listings

📢Paid

Visitors: N/AFees: Impact: GrowingBest for: Blend paid and organic visibility on eBay

Promoted Listings Standard: pay only when item sells
Typical ad rates range from 2–8% of sale price
Promoted listings appear in organic search results
Use Promoted Listings Advanced for keyword targeting

Listing Format & Duration

⚙️Strategy

Visitors: N/AFees: Impact: MediumBest for: Good Till Cancelled listings build ranking history

Use Good Till Cancelled (GTC) format for fixed-price listings
GTC listings accumulate sales history and ranking signals
Avoid ending and relisting — you lose ranking history
Revise existing listings instead of creating new ones

Related Pages & Tools

Amazon SEO Guide

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Title Optimizer

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Listing Score Checker

Check your listing quality score

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Frequently Asked Questions

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