---
title: "The 150/850 Rule for Google Shopping Descriptions"
description: "Google gives you 5,000 characters for product descriptions. The average brand uses 147. Here's the framework top performers use to fill the gap."
publishedAt: "2024-12-05"
author: "Ruslan Galba"
type: "thread"
updatedAt: "2024-12-05T00:00:00.000Z"
tags: ["google-ads", "shopping", "feed-optimization", "ecommerce", "copywriting"]
---

# The 150/850 Rule for Google Shopping Descriptions

Google gives you 5,000 characters for product descriptions. The average brand uses 147. Here's the framework top performers use to fill the gap.

Google gives you 5,000 characters for product descriptions.

Average brand uses 147.

Top performers? 800-1,000 characters with 8-12 keywords baked in.

That's not optimization. That's leaving revenue on the shelf.

Here's what we found after auditing dozens of Shopping feeds:

The first 145-180 characters are the only ones visible in search results.

Most brands stuff "premium quality" and "best-in-class" into this space.

Problem: Nobody searches for "premium quality."

They search for "wireless noise cancelling headphones for flights."

Here's what the data shows:

- Google Shopping avg CTR: 0.86%
- Avg CPC: $0.66
- Conversion rate: 1.91%

Brands hitting 2-3x these benchmarks have one thing in common:

They're using 500-1,000 characters. Not 147.

The extra space isn't wasted. It's working.

The 150/850 rule:

First 150 characters = SERP bait.
Next 850 = conversion copy.

Most brands flip this. Or skip both.

How the 150/850 split works:

First 150: Keywords + core benefit + search intent match.

"Wireless noise-cancelling headphones with 30-hour battery for travel, work, and commuting."

Next 850: Use cases, not specs. Answer "will this work for ME?"

Specs don't sell. Context does.

Keywords: 8-12 per description, naturally integrated.

Not stuffed. Woven into sentences.

"These headphones block airplane engine noise (not just office chatter)" hits:
- headphones
- airplane noise
- office noise
- noise cancelling

One sentence. Four keywords. Zero stuffing.

What to cut from your descriptions:

- "Premium quality"
- "Best-in-class"
- "State-of-the-art"
- "Industry-leading"

Marketing fluff isn't searchable.

Real search terms are.

Quick audit for your feed:

1. Check character count (target 800-1,000)
2. Read first 150 chars—would YOU search those words?
3. Count keywords (aim for 8-12)
4. Cut any phrase nobody would type into Google

Takes 10 minutes per product. Worth every second.