In one sentence: A Shopify theme is the packaged set of design and template files, built with Liquid, HTML, CSS, and JavaScript, that controls how a store's pages look and how they function.
A theme decides where the header sits, how a product page lays out its photos and buy button, and what a shopper sees while browsing a collection. Most themes are built from swappable sections and blocks, so a store owner can reorder a homepage or drop in a new block through the built-in editor without writing code.
Underneath that editor sit the theme's actual files, written in Liquid, HTML, CSS, and JavaScript, which is what a developer opens to change something the built-in settings do not expose. The same theme can look quite different from one store to the next once colors, fonts, imagery, and section choices change.
Many stores start from an existing theme and adjust it inside the editor, which covers a lot of ground without touching code. The question worth asking is what happens once a store needs a layout, feature, or brand feel a theme's settings cannot reach: keep adjusting the theme, or bring in a developer to build past it.
The answer to should I hire a Shopify developer or use a theme lays out that decision and the signs that point each way.
A theme from Shopify's Theme Store, made once and adjusted by each store that uses it, is the Shopify version of a template website. The word theme covers more than that, though: a theme written from scratch for one store is still a Shopify theme, built from the same kinds of files and run from the same editor. So knowing a store runs a theme says nothing on its own about whether that theme is a template.
Yes. Products, pages, customers, and orders live in the Shopify admin, apart from the theme, so publishing a different theme leaves them untouched. The part that has to be redone sits inside the old theme itself: its section arrangements, the text and images typed into those sections, and any custom code, all set up again or rebuilt in the new one.
Yes. A store can hold several themes in its theme library, but only one is published and shown to shoppers at a time. Each theme keeps its own settings and section arrangements, so a change made in one does not appear in another.
Should I hire a Shopify developer or use a theme? · Template website · Liquid · Theme sections · All glossary terms · Plain-English answers · All services
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