How to Add Reviews to Shopify: Everywhere Except Checkout

Shopify has one constraint that decides everything else about where reviews go, and most guides never mention it. Checkout is locked unless you are on Shopify Plus. The final screen before someone types their card number, the exact moment of maximum hesitation, is a screen you cannot put anything on. So every piece of reassurance has to land earlier, on the product page and the cart, because those are the last surfaces you control. That is the placement argument. The install itself is a Custom Liquid section in the theme editor, which takes a minute, works on every plan, needs no app, and survives theme updates in a way that editing theme.liquid by hand does not.

Why Does Checkout Being Locked Change Your Plan?

Because it removes the highest-intent surface on the store from your control. On most sites the equivalent moment, the booking form or the quote request, is exactly where you would put third-party proof. On Shopify below Plus you cannot: checkout is Shopify's, not yours.

So the reassurance has to be delivered before the buyer gets there and has to still be working in their memory when they arrive. In practice that means the product page carries the argument and the cart carries the reminder.

It also means you should not spend effort hunting for checkout workarounds. Scripts injected into checkout below Plus either do not run or break, and Shopify has tightened this repeatedly. Treat it as a fixed boundary and design around it.

Where Does the Code Actually Go?

Online Store, then Customize, then pick the template you want. Add a section or a block and choose Custom Liquid. Paste the widget snippet into it and save. It appears in the theme editor's preview immediately and you can drag it up and down the section list to position it.

This is the route to use on every plan. It needs no app, it costs nothing per month, and because the code lives in the theme's settings rather than in a theme file, a theme update does not touch it.

The alternative you will see recommended, editing theme.liquid or a section file in the code editor, works right up until the theme updates and silently reverts your change. Every Shopify merchant who has lost a customisation has lost it that way.

What About Shopify's Own Product Reviews?

They answer a different question, and you want both. A product review tells a shopper whether that item is good. A third-party store review from Google or Trustpilot tells them whether your shop is real, ships on time and answers its email, which is what a first-time visitor to an unfamiliar store is actually worried about.

The reason the third-party ones carry more weight for that question is that you do not control them. A shopper knows a store controls its own on-site review display, so the reviews that sit on a platform they can independently open are the ones that resolve the trust question.

Keep product reviews where the theme puts them, under the item. Put store reviews where the merchant is being judged rather than the product: the homepage, the cart, and a compact rating near the add-to-cart button.

Where Exactly Should the Widget Go?

Two places do the work. On the product template, a compact rating block near the add-to-cart button, so the merchant-trust question is answered at the moment the buyer commits to the item. Not a full wall here, which competes with the product imagery and the description.

On the cart, a slightly fuller block. The cart is the last surface you own before Shopify's checkout takes over, and it is the point where an unfamiliar store loses people. This is the placement most stores skip and it is the one the locked checkout makes important.

The homepage is worth a proper review wall if you have the traffic, but it is third in line. A buyer who reached a product page from a search result may never see your homepage at all.

Why Not Just Install an App?

Because Shopify apps charge monthly, per feature, forever, and they load their own scripts on every page of your store whether the feature is on that page or not. For a review widget that is a recurring cost and a permanent performance tax to render a block of HTML.

Apps earn their keep when they need to read or write your store's data: inventory, orders, customer records, discount logic. A widget that displays reviews from an external platform reads none of that.

The one honest exception is if you want review collection tied to order fulfilment, emailing buyers after delivery. That genuinely needs order data and therefore an app. Displaying reviews does not.

What Are the Steps?

Build the widget, match the colours and fonts to your theme, and copy the embed code. Pick a compact layout for the product page and a fuller one for the cart if you are doing both.

In Shopify go to Online Store, then Customize, select the product template, add a Custom Liquid block near the add-to-cart button, paste and save. Repeat on the cart template.

Then check a real product page and a real cart on a phone, logged out. Most Shopify traffic is mobile and the theme editor preview is not the same thing as the live storefront.