eBay Cassini Algorithm: The 15 Secrets System Explained

The eBay Cassini Algorithm is the silent force that decides which listings rise to the top and which disappear into search oblivion. But what if you had a proven system to decode its behavior? Welcome to the “15 Secrets System” — a powerful framework built to help sellers understand, adapt, and win on eBay.

In this guide, we’ll break down how the algorithm works and reveal the 15 actionable secrets that can dramatically boost your visibility, clicks, and sales in 2025.

1. Competitive Pricing Strategy

One of the most important ranking factors is price competitiveness in eBay Cassini Algorithm.

  • Start with slightly lower prices to gain traction.
  • Once your listing has sales history, raise prices gradually.
  • Use tools like AutoDS, PriceYak, or Repricer.com to automate dynamic pricing.

Cassini rewards listings that offer strong value—and price is a key signal.

2. Sales History = Higher Visibility

A proven sales record tells Cassini you’re trustworthy.

  • Never delete successful listings — update instead.
  • Refresh the title, description, and pricing to stay relevant.
  • Use eBay’s “sold listings” filter to analyze competitor sales.

A strong sales history boosts your trust score and helps you rank higher.

3. Keyword-Rich, Natural Titles

The eBay Cassini Algorithm relies heavily on your product title for indexing.

  • Use all 80 characters when possible.
  • Include keywords like brand, model, color, size, material, and function.
  • Keep it natural—avoid robotic keyword stuffing.

Example:
“Modern Black Metal Dining Table – Space-Saving Furniture for Small Apartments”

Titles like this speak to both Cassini and the buyer.

4. High-Quality, Unique Product Images

Images influence both CTR and conversion rates in eBay Cassini Algorithm.

  • Use high-res photos from multiple angles.
  • Fill all 12 image slots.
  • Consider overlays, watermarks, or collages for added visual value.

Strong images help Cassini see your listing as more attractive and professional.

5. Alt Tags: The Hidden SEO Weapon

Most sellers overlook this, but image alt tags are important.

htmlCopyEdit<img src="black-dining-table.jpg" alt="black metal dining table for small spaces">

Alt tags help both Cassini and Google understand your product. This small change can lead to a big SEO boost.

eBay Cassini Algorithm

6. Increase Click-Through & Conversion Rates

Cassini watches your CTR and conversion rate closely.

Improve both by:

  • Writing clear and compelling titles.
  • Using eye-catching thumbnails.
  • Avoiding misleading or clickbait tactics.

A high CTR paired with strong conversion tells Cassini that your listing delivers on expectations.

7. Fast Shipping & Handling Times

Speed = trust in Cassini’s eyes.

  • Set handling time to 1 business day.
  • Use reliable carriers with tracking.
  • Offer Free Shipping by incorporating the cost into your price.

Fast, reliable delivery helps you rank higher and reduces cart abandonment.

8. Stay Active with Regular Updates

Inactive stores fall out of favor quickly.

  • Add new listings daily or weekly—even slight variations help.
  • Regularly revise older listings.
  • Test underperformers with new images or updated titles.

Cassini favors sellers who stay engaged.

9. Excellent Customer Service = SEO Boost

Cassini tracks your communication metrics and buyer feedback.

  • Respond to buyer messages within an hour when possible.
  • Use polite, helpful messaging—especially after purchase.
  • Resolve disputes quickly to protect your feedback score.

Good service helps maintain your seller health and increases algorithm trust.

10. Take Advantage of Listing Timing

Every new listing gets a temporary boost from Cassini.

  • List items around 6 PM EST, when traffic is high.
  • Use the “Sell Similar” option instead of relisting to refresh stale products.

Smart timing means more eyeballs during that golden trial window.

11. Maintain Top Seller Performance

Your seller level directly impacts ranking.

  • Keep a late shipment rate under 5%.
  • Upload tracking numbers for every order.
  • Resolve cases quickly and maintain low defect rates.

Cassini loves accounts with clean performance metrics.

12. Fill Out All Item Specifics

Item specifics help Cassini match search queries accurately.

  • Add details like brand, model, size, weight, color, material, and more.
  • Use Terapeak or ZIK Analytics to see what successful sellers are using.
  • Match or beat your top competitors on listing completeness.

Full data = full visibility.

13. Optimize for Mobile Traffic

Over 60% of eBay traffic comes from mobile devices.

  • Use mobile-friendly templates.
  • Keep bullet points short and digestible.
  • Avoid large chunks of text or oversized images.

A seamless mobile experience increases both usability and search ranking.

14. Use Lightweight HTML Templates

Cassini favors fast-loading listings.

  • Avoid bulky scripts or animations.
  • Use clean, minimalist HTML.
  • Stick to 1 embedded image (if any) in the description area.

Speed equals better performance—not just for SEO but also for user experience.

15. SEO-Optimized Description Images

Your product description can include SEO-boosting visuals.

  • Use images like size charts, feature callouts, or usage demos.
  • Add keyword-rich alt tags.
  • Compress image sizes to reduce loading time.

These elements help you rank in Google Image Search and keep buyers engaged.

Summary Table: 15 Ways to Rank Higher with the eBay Cassini Algorithm

# Strategy Key Action
1 Competitive Pricing Strategy Use automated tools and start low to gain traction
2 Build Strong Sales History Never delete successful listings—refresh instead
3 Keyword-Rich Titles Use all 80 characters, include brand, color, material
4 High-Quality Images Upload 12 unique, high-res product photos
5 Add Image Alt Tags Use descriptive keywords in alt text
6 Boost CTR & Conversions Create accurate, attractive listings
7 Fast Handling & Shipping 1-day handling + trusted carriers with tracking
8 Stay Active Add new listings & update old ones regularly
9 Prioritize Customer Service Respond quickly and maintain high feedback ratings
10 Smart Listing Timing Post listings around 6 PM EST and use “Sell Similar”
11 Maintain Top Seller Status Keep defect and late shipment rates low
12 Complete Item Specifics Include all relevant product attributes
13 Mobile Optimization Use responsive templates with short bullets
14 Lightweight HTML Templates Use minimal code for faster load times
15 SEO-Optimized Description Images Add visuals with alt tags + compress images for fast loading

Final Thoughts: Make the Cassini Algorithm Your Ally

The eBay Cassini Algorithm isn’t a mystery—it’s a guidepost for delivering better experiences to buyers.

By using this 15-part system, you’re not just “optimizing for the algorithm”—you’re creating listings that:

Rank higher in search
Earn buyer trust
Convert faster
Drive consistent traffic

Success on eBay is about strategic consistency, not shortcuts. If you stay active, price smartly, and treat your buyers well, Cassini will reward you with more visibility, better rankings, and ultimately, more sales.