In our work optimizing online stores, we know your description field is your ultimate sales pitch. Yet we see many eBay sellers copy-pasting raw text walls or using old, non-responsive templates. In our experience, an unoptimized listing description leads directly to buyer drop-offs, lowered search rankings, and negative store metrics.
Optimizing for eBay's Cassini Search Engine
eBay uses a search algorithm called Cassini to determine how listings rank. Cassini measures sell-through rates, CTR, and buyer interaction times. By placing structural details, return terms, and shipping parameters directly in clean description templates, you increase the time buyers spend looking at your listing, which signals high listing relevancy to Cassini.
| Description Attribute | High-Converting Practice | Mistakes to Avoid |
|---|---|---|
| Layout Formats | 100% mobile-responsive grid elements | Fixed-width layouts forcing horizontal scrolls |
| Font styling | Clean system fonts (Arial, Segoe UI) | Over-stylized fonts, rainbow colors, flash JS |
| Policy structures | Tabbed panels or clear structured sections | Wall of text policies hidden at the bottom |
Three Rules for Description Success
- Cassini Keyword Density: Place your primary target listing keywords naturally in the first and last paragraph. Avoid keyword stuffing.
- Mobile-First Formatting: Test descriptions on smartphones. Over 60% of eBay transactions are completed on mobile screens.
- Clear Visual Hierarchy: Structure descriptions into three distinct zones: Item Condition/Highlights, Full Technical Specifications table, and Business Policies (Shipping, Payment, and Returns).