The 150/850 Rule for Google Shopping Descriptions

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.