I have been asking myself one question for a while now: What is the real difference between a supermarket display and an Amazon store? Do they work the same way? Do they convert at the same rate?
Consumer behaviour keeps changing because the environment around the buyer keeps changing. So I went to Amazon and searched their best sellers in the food and beverage category. Two products caught my eye.
The first is CELSIUS, a Functional Energy Drink ranked #1 in its category. It has 4.5 stars, 27,989 reviews, the Amazon's Choice badge, and a three word tagline: Live. Fit. Go.
The second is Bloom Nutrition, a Zero Sugar Sparkling Energy Drink ranked #3, with 4.8 stars and 2,044 reviews. It has a soft lavender can, a crisp apple graphic, and a promise built on prebiotics and clean energy.
Now picture both products side by side on a supermarket shelf instead of an Amazon page. The selling conditions are completely different.
In a supermarket there are no reviews, no 4.5 stars and no Amazon's Choice badge. There are no detailed bullet points, no social proof and no verified purchase tags.
What the shopper sees is a can with a colour, a font, a logo and a few words printed on aluminium.
The product is the same, but the environment is not, and what it takes to convert a buyer changes with it.
The Question Behind the Comparison
That raises a marketing question: What does a buyer need to see, read, and feel to trust this product enough to purchase it, and does that change depending on where they encounter it?
It does, and a psychological model helps explain why.
The Elaboration Likelihood Model: Not All Persuasion Works the Same Way
In 1986, two psychologists, Richard Petty and John Cacioppo, introduced a widely used framework in consumer behaviour research: the Elaboration Likelihood Model (ELM).
The idea is that persuasion does not always work the same way. When a buyer comes into contact with a product, they take one of two routes.
The Deep Processor
- Reads the ingredients carefully
- Compares competing products
- Weighs arguments and evidence
- Checks reviews before deciding
- Makes a considered, deliberate choice
The Fast Mover
- Shopping quickly or distracted
- Low involvement with the category
- Responds to packaging attractiveness
- Influenced by brand familiarity
- Triggered by shelf placement or price
A buyer persuaded through the central route is harder to switch away because their decision is anchored in argument and evidence. A buyer persuaded through the peripheral route is faster to convert but more fragile, since the next flashy display could easily pull them away.
Applying this to two retail channels makes the difference easy to see.
Supermarkets Activate the Peripheral Route
When a consumer walks into a supermarket and stops in front of the beverage aisle, they are rarely in deep processing mode. They are not there to research. They are there to shop.
This is why CELSIUS's bright, clean white can with its bold logo communicates before the buyer has read a single word. This is why Bloom's soft lavender design and the apple graphic signal "light, healthy, refreshing" in under three seconds of shelf contact.
In a supermarket environment, four things drive conversion:
| Cue | How it works in a supermarket |
|---|---|
| Discovery | The product must be at eye level, in a high traffic zone, or supported by POS (point of sale) material. Proximity does the work an algorithm does online. |
| Trust | Comes from brand recognition, prior exposure and a professional label rather than data or reviews. |
| Buying trigger | Emotional and immediate, driven by thirst, habit, a promotion, or a moment of social comparison. |
| Copy | The front of a can holds approximately 8 to 12 words. "Zero Sugar. 180mg Caffeine. Live Fit." must do all the persuasive work. |
Here, the packaging is the marketing copy. It is the only tool a brand has to reach a peripheral route shopper and move them toward a purchase.
Amazon Activates the Central Route
The same consumer who grabbed CELSIUS off a shelf without reading the label will behave very differently when they encounter it on Amazon.
They searched for "zero sugar energy drink no jitters" or "healthy energy drink 12 pack." Searching signals motivation, and motivation activates the central route.
So they are processing information:
| Element | What the central route buyer is evaluating |
|---|---|
| The title | Does it contain the keywords that match what they searched? Does it communicate the product's core benefit immediately? |
| Bullet points | Do they answer a considered buyer's questions about ingredients, certifications, quantity and distinguishing features? |
| Reviews | 27,989 for CELSIUS vs. 2,044 for Bloom. Both are strong, but review volume works as social proof that shortcuts deep processing. |
| Price per unit | In a supermarket, CELSIUS and Bloom prices are invisible to each other. On Amazon, they sit three scrolls apart on the same page. The comparison is instant. |
| Amazon's Choice badge | A peripheral cue embedded in a central route environment. Even deep processors respond to authority signals. |
Good Amazon copy meets a motivated, comparing, evaluating buyer where they are, and gives them shortcuts (ratings, badges, taglines) that ease decision fatigue.
Nine Dimensions That Separate the Shelf From the Screen
| Dimension | Supermarket | Amazon |
|---|---|---|
| Discovery | The planogram works as the algorithm, so shelf height and end aisle positioning control visibility. | The search engine works as the algorithm, so SEO, review velocity, and sponsored placement determine who gets found. |
| First Impression | The can, with its colour, font and logo, must communicate brand, benefit, and category in under three seconds. | The hero image and the first line of the title must do the same job, in the same time window. |
| Trust Signals | Label quality, certification marks (Non GMO, Gluten Free), and brand familiarity. | Star ratings, review text, verified purchase tags, and the Q&A section. Trust is socialised. |
| Buying Trigger | Impulse, driven by thirst, habit, proximity, and in store promotion. | Considered, because the buyer searched, compared, and evaluated before clicking Add to Cart. |
| Product Information | A supermarket can holds approximately 80 words of copy across all its surfaces. | An Amazon listing can carry 2,000+ words, enhanced by A+ content, video, and comparison charts. |
| Price Visibility | Static and local. A brand's price exists in isolation on the shelf. | Dynamic and comparative. Every competitor's price is three scrolls away on the same page. |
| Competitive Landscape | Competitors sit physically next to each other, so a shopper can hold Bloom, CELSIUS, and Red Bull at the same time. | Competitors sit next to each other algorithmically, appearing in "Frequently Bought Together" and sponsored placements. |
| Reach | A supermarket serves a catchment area. Expanding reach means building a new location. | A single listing is visible to buyers in New York, London, Sydney, and everywhere Amazon ships. Reach depends on listing quality rather than logistics. |
| Performance Metrics | Sell through rates and reorder volumes, which are slow, indirect, and only visible after the fact. | CTR (click through rate) shows whether your main image stopped the scroll. CVR (conversion rate) shows whether the listing closed the sale. Both can be read while the listing is live. |
One Brand, Two Briefs
A brand selling across both channels cannot use the same copy in both places. The channel is different, so the buyer's processing mode is different, and the copy has to change with it.
The Packaging Brief
What peripheral cue will intercept a low involvement shopper in under three seconds? What does the can communicate before the buyer has read a single word?
The Listing Brief
What central route argument will satisfy a motivated buyer who has already searched, is already comparing, and needs a structured reason to choose this product over the twelve others on the same page?
The two briefs will produce different copy, but with a clear brand strategy they tell the same story in the language each channel needs.
What This Case Study Taught Me
I started this analysis because I wanted to understand what makes a product description work. I ended up with a framework for thinking about retail strategy altogether.
The copy is a response to the environment. Writing it starts with asking: what route is this buyer on? What cues will build trust here? What argument is this channel willing to hold?
Bloom Nutrition and CELSIUS gave me two real products to work with, and the Elaboration Likelihood Model gave me a lens to look at them through.
Cecilia Awoniyi is a marketing strategist specialising in omnichannel content strategy for consumer brands. This article is part of a portfolio series applying marketing theory to real product and retail strategy.
www.ceciliaawoniyi.com