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GLOSSARY

Shopify and eCommerce terms, in plain English.

Forty-six terms you will hear in every store build, migration and growth conversation — defined the way we explain them on calls, with a page per term for the ones that matter most.

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#

301 redirect

A permanent redirect from an old URL to a new one. The backbone of an SEO-safe migration.
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A

A/B testing

Showing two versions of a page to split traffic and measuring which converts better.
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Abandoned checkout

A shopper who reached checkout and left. Shopify records it; email and SMS flows recover it.

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AEO (answer engine optimisation)

Making your store the source that ChatGPT, Perplexity and AI Overviews cite when answering.
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AOV (average order value)

Revenue divided by orders. Bundles, free-shipping thresholds and upsells move it.
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B

B2B on Shopify

Company accounts, price lists, net terms and rep ordering built into Shopify Plus.
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Bundles

Several products sold as one. Native on Shopify via the Bundles app or Shopify Functions.
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C

Checkout Extensibility

Shopify’s app-based way to customise checkout, replacing checkout.liquid and Scripts.
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Collection

A group of products — manual or automated by tag, price or vendor.
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Core Web Vitals

Google’s three speed and stability metrics: LCP, INP and CLS.
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CRO (conversion rate optimisation)

Changing a store so more visitors buy, measured with tests rather than opinions.
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Customer accounts

Shopify’s passwordless accounts with order history, subscriptions and B2B features.
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D

Draft order

An order created by a merchant on a customer’s behalf; common in B2B and phone sales.
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Discount functions

Custom discount logic written with Shopify Functions instead of Scripts.
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G

GEO (generative engine optimisation)

A near-synonym for AEO: optimising for generative AI answers.
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H

Headless commerce

A storefront built separately from Shopify’s theme layer, talking to it through APIs.
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Hydrogen

Shopify’s React framework for headless storefronts, hosted on Oxygen.
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K

Klaviyo flows

Automated email and SMS sequences triggered by behaviour: welcome, abandoned cart, post-purchase.
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L

Liquid

Shopify’s templating language, used in every theme.
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llms.txt

A plain-text file that tells AI crawlers what a site is about and which pages matter.
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LTV (lifetime value)

Total revenue from a customer over their relationship with your store.
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M

Metafields

Custom fields on products, collections, customers and orders — the way you extend Shopify’s data model.
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Metaobjects

Custom content types in Shopify, such as ingredients, stockists or FAQs.
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Migration

Moving a store from one platform to Shopify: products, customers, orders, URLs and rankings.
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O

Online Store 2.0

Shopify’s theme architecture with sections on every page and JSON templates.
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Oxygen

Shopify’s hosting for Hydrogen storefronts.
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P

PDP (product detail page)

The product page. Usually the most-tested page on a store.
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Pixels

Shopify’s sandboxed way of running tracking scripts for Meta, Google and others.
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POS

Shopify Point of Sale: selling in person from the same inventory and customers as online.
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R

Redirect map

The spreadsheet of old URL → new URL pairs used in a migration.
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Returns and exchanges

Shopify’s native returns plus apps such as Loop for self-serve exchanges.
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S

Schema markup

Structured data (JSON-LD) that tells search engines what a page contains.
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Sections

Editable blocks of a Shopify theme that merchants can add, reorder and configure.
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Shop Pay

Shopify’s accelerated checkout with saved details and installments.
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Shopify Flow

Shopify’s automation tool: triggers, conditions and actions without code.
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Shopify Functions

Custom backend logic for discounts, shipping, payment and bundles.
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Shopify Markets

Selling in multiple countries from one store: currency, language, duties and domains.
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Shopify Plus

Shopify’s enterprise plan: B2B, checkout customisation, higher limits and more staff accounts.

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SKU

Stock keeping unit: the identifier for each variant you sell.
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Storefront API

The GraphQL API that headless storefronts use to read products and create checkouts.
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Subscriptions

Recurring orders, native on Shopify or via Recharge and Skio.
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T

Theme app extensions

How apps add blocks to a theme without editing its code.
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Theme editor

The visual customiser merchants use to change sections and settings.
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V

Variants

The versions of a product: size, colour, material. Shopify allows up to 2,048 per product.
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W

Webhooks

Notifications Shopify sends to another system when something happens, such as an order.
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Wholesale channel

Selling to retailers at trade prices, on Plus via B2B or on standard Shopify via apps.
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