Comment selling is a method where customers reserve or purchase products by commenting on a store's social media post. Instead of browsing a website or downloading an app, customers simply comment on a Facebook or Instagram deal post — and an automated system confirms their reservation instantly.
The concept has been around in fashion and boutique retail for years, popularized by platforms like CommentSold. But comment selling for grocery stores is fundamentally different — and arguably more powerful. Instead of shipping products, customers pick up their reserved items in store. That distinction changes everything.
How Comment Selling Works — Step by Step
The process is straightforward:
1. The store posts a deal. A grocery store posts an offer on their Facebook page — for example, "50 lb box of Idaho potatoes, $7.90 (regular $19.99). Comment to reserve."
2. Customers comment to reserve. Interested customers comment on the post with their preferred store location and quantity. No login, no account creation, no app download.
3. The system confirms automatically. A comment selling platform like Commentsell detects each comment in real time, parses the order, and replies with a personalized confirmation — the customer's name, quantity, and pickup location — within seconds.
4. Customers pick up in store. During a designated pickup window, customers visit the store and collect their reserved items. The discount is applied at checkout.
That's it. No shopping cart, no checkout page, no shipping logistics. Just a comment, a confirmation, and a store visit.
Why Grocery Stores Are the Perfect Fit
Comment selling originated in fashion and boutique retail, where sellers go live on Facebook and viewers comment "sold" to claim items. But grocery has structural advantages that make comment selling even more effective:
Perishables demand fast turnover
Grocery stores deal in products with short shelf lives. Comment selling lets you move inventory fast — post a deal in the morning, sell out by afternoon. For expiring stock, seasonal produce, or bulk items, this speed is critical.
Every reservation drives foot traffic
Unlike e-commerce where products are shipped, comment selling for grocery requires customers to visit the store. And when they come in to pick up their reserved potatoes, they don't just grab the deal — they shop the aisles. The reserved item gets them through the door; the rest of the store does the upselling.
No app or website needed
Most grocery stores — especially independents — don't have the budget or technical resources to build an app or e-commerce platform. Comment selling requires nothing beyond a Facebook page the store already has. The barrier to entry is essentially zero.
Social proof is built in
When a deal post has 200 comments, it's visible to everyone who follows the page. Each comment is social proof that drives more comments. This creates a viral loop that no paid ad can replicate.
Real Results
Swensen's Magic Markets, Idaho
An independent grocer with four locations posted a deal on 50 lb boxes of Idaho potatoes at $7.90 (60% off). The result: 700 comments, 501 boxes sold — over 12 tons of potatoes from a single Facebook post. The Shelby Report, a respected grocery trade publication, covered the story and called it "an online sales channel that rivals any app." Read the full case study.
ICA Nära Träffen Mörarp, Sweden
A small-town grocery store implemented an automated comment selling system in November 2023. Within two months, they hit nearly 4,000 reservations per month with over $75,000 in reservation value in January alone — excluding additional purchases customers made while in the store. The owner credited the automation as the decisive factor: manual comment management would have been impossible at that volume. Read the full case study.
234,000 Subscribers Across Sweden
Stores using comment selling in Sweden have collectively built an audience of 234,000 subscribers — people who opted in to receive future deals directly via Messenger or Instagram DMs. That's 2.3% of Sweden's entire population. Every comment selling campaign is also a subscriber acquisition opportunity: the customer who reserves today becomes the subscriber who sees every future deal. Read more.
How to Get Started
Comment selling works with your existing Facebook page — no new technology to set up, no app for your customers to download. You need a comment selling platform to handle the automation (parsing comments, confirming reservations, managing pickup lists), and then you start posting deals.
See how it works or schedule a demo to see the system in action.