Shopping Cart

The shopping cart (also called the "cart" or "basket") is the component of every online store that temporarily gathers the products a buyer has selected but not yet paid for. It works as an editable list: it shows each item with its quantity, unit price and subtotal, calculates the total with taxes and shipping, and lets the shopper add, remove or change quantities before moving on to payment.

It is the step right before checkout: the cart gathers the purchase intent and checkout turns it into a paid order. While the cart is active, nothing is confirmed; the customer can keep browsing, compare and come back. That is why it is one of the most sensitive points of the conversion funnel, where you measure how many visitors go from looking to paying.

In commerce built on Salesforce, cart data (products, value, abandonment) feeds the sales operation that Sellium structures, so an abandoned cart can turn into a sales follow-up or a WhatsApp conversation.

How it works under the hood

When someone clicks "Add to cart", the store creates or updates a session that links the buyer to a list of products. Each line stores the product identifier (its SKU), the quantity, the current price and a subtotal. The cart recalculates the total every time something changes and, depending on the platform, keeps that data in the user's browser or on the server so it is still there if the person comes back later.

There are two persistence modes worth telling apart: the session cart, which lives for the length of the visit and is cleared when the browser closes, and the persistent cart, tied to the customer's account, which keeps the products for days or weeks across devices. The persistent cart is key to selling to people who research on their phone and buy later on their computer.

Why it matters for the business

The cart is where the sale is decided. According to the Baymard Institute, which averages 50 studies, the documented cart abandonment rate is around 70% (a reference figure, not our own result): out of every ten people who build a cart, about seven leave without paying. Every point you recover there hits revenue directly, without spending more to attract traffic. That is why measuring the cart (average value, abandonment rate, most-abandoned products) usually pays off more than bringing in new traffic.

A concrete example in Argentina

An apparel store that sells through its website and WhatsApp gets a customer who builds a cart of three garments for ARS 90,000 and abandons it at the shipping step, frustrated because the cost of delivery to the provinces only appeared at the end. The store detects that abandoned cart, sends a WhatsApp message with the details and a shipping coupon, and the customer comes back and pays. That second chance, multiplied by hundreds of carts a month, is what separates an e-commerce business that scales from one that stalls.

Common mistakes

• Last-minute surprises: extra costs (shipping, taxes or fees) are the top reason for abandonment among shoppers who were not just browsing, according to the Baymard Institute survey of US online shoppers; showing them only at checkout turns them into a surprise.
• Forcing account creation to view the cart or move forward, instead of allowing guest checkout.
• Not persisting the cart: losing the products when the customer closes the tab or switches devices.
• A slow or confusing cart: too many steps, unclear buttons or no visible summary of the total.
• Ignoring abandoned carts: not having any abandoned cart recovery mechanism leaves money on the table.

How it differs from checkout

Cart and checkout are often confused, but they serve different functions within the same purchase.

In short, the cart gathers the intent and checkout closes it. Getting the cart right (showing clear costs, not asking for unnecessary sign-ups, keeping the products and reacting to abandonment) is one of the highest-return levers in any digital commerce operation.