I noticed something strange today and I’m hoping someone can explain it.
On desktop, my sponsored product is sitting in position #4 on the first page for a core keyword. Great, right? But when I check the same keyword on the Amazon mobile app (same account, same Wi-Fi, same zip code), my ad is nowhere to be found until page 3 – and even then, it’s a different placement.
I understand that mobile has fewer slots per page. But the discrepancy feels too big. Is Amazon running two completely different ranking algorithms for desktop vs. mobile? Or is there something else going on (personalization, different auction pools, etc.)?
For those who have studied this, what are the key differences between PC and mobile ad ranking? And how should we adjust our bidding and targeting strategies to win on mobile, where most of our customers actually shop?
Any insights would be hugely appreciated.
Answers (10)
If you want to truly understand the difference, run a simple test:
You’ll see that location can change mobile ad rank by 5-10 positions. That’s because Amazon prioritizes fulfillment speed more on mobile. Use this to your advantage: target ads by region using geotargeting in your campaigns (available for Sponsored Display and some SP placements).
Good luck. This issue drives everyone crazy, but once you understand the mechanics, you can exploit them.
I stopped caring about desktop rankings 2 years ago. 80% of my sales come from mobile. Here’s my mobile-only playbook:
Desktop is for tracking trends. Mobile is where you make money. Adjust your mindset.
One word: Rufus. Amazon’s AI shopping assistant is now fully integrated on mobile. Rufus answers user questions (“best blender for smoothies”) and can recommend products that don’t perfectly match the search term. That means your ad might show for a query you never bid on – and Rufus learns from engagement. If your listing has high-quality Q&A (real questions from customers) and your A+ content answers common questions, Rufus is more likely to surface you. Optimize for conversational search, not just keywords.
Don’t forget Amazon Posts – they appear only on mobile, in the “Related posts” section below the fold. They don’t directly affect keyword ranking, but they can drive discovery and increase your brand’s overall mobile visibility. Post consistently (3-5 times a week) with lifestyle images. It’s free traffic.
This might be obvious, but your images are the #1 factor on mobile. On desktop, people see your title, price, and reviews. On mobile, the image takes up 70% of the screen real estate. If your main image doesn’t clearly show the product and its value proposition in a thumbnail, you’re dead.
I’ve seen products with mediocre relevance but outstanding mobile-optimized images outrank better products on mobile consistently. Invest in a professional mobile-first image: bright background, product filling the frame, one or two key benefit callouts in large text (yes, text on image is allowed if it’s not promotional). Test it.