Australian Shopify theme development is mostly about putting Afterpay in the right place, collection page SEO content, and undoing what too many apps have done to your load speed

Moving the Afterpay widget to the product price line requires editing the product page Liquid template — typically `product.liquid` or the relevant JSON template's product section — to call the Afterpay widget snippet immediately after the price display block. The Afterpay app injects a script that renders the widget wherever a specific HTML element appears in the template. By moving that element from its default position (below the add-to-cart button) to the price section, the widget renders at the price line. This requires familiarity with Liquid templating and your specific theme's section structure, and must be tested across multiple price points and device sizes.

Adding text content to Shopify collection pages requires building a custom Shopify 2.0 section — an `.liquid` file in your theme's sections folder with a defined content schema — and adding it to your collection page JSON template. The section can include fields for a heading, introductory paragraph, FAQ accordion, and closing content block. Once built, the section appears in the Shopify theme editor and can be configured per collection page. This approach is separate from — and does not interfere with — your product grid, filter panel, or pagination. Older pre-2.0 themes handle this differently, typically requiring a direct edit to `collection.liquid`.

Among paid themes commonly used by Australian Shopify brands, Turbo (by Out of the Sandbox) is built with performance as an explicit priority and typically scores higher on Google PageSpeed Insights than Prestige or Impulse on a clean install. However, theme performance on a clean install and theme performance after 12 months of app installations are very different numbers. A clean Turbo install can lose 20 to 30 PageSpeed points from accumulated app scripts. The more important factor for Australian stores is not which paid theme you choose, but how the theme handles app script loading and whether responsive images are implemented correctly.

Fixing app-caused render blocking requires auditing your `theme.liquid` file to identify which app scripts are injected in the `<head>` tag and loading synchronously. Scripts that are not required for above-the-fold rendering can be marked with `defer` or `async` attributes, or moved to just before the closing `</body>` tag. Some Shopify apps inject scripts through their own app block rather than directly into theme.liquid — for those, the load behaviour is controlled by how the app block is positioned in your theme sections. A full fix involves auditing all injection points, testing which scripts are render-critical, and deferring or relocating those that are not.

Customising an existing Shopify theme means making targeted changes to a theme you already have — adding sections, editing Liquid templates, adjusting CSS, and fixing specific issues — without rebuilding the theme's core architecture. Building a custom Shopify theme means writing a new theme from scratch, including all Liquid templates, the section library, CSS, JavaScript, and the `theme.liquid` base layout. Custom theme builds take significantly longer (eight to sixteen weeks for a full build), cost more, and require ongoing maintenance because Shopify theme API updates need to be applied manually. For most Australian Shopify brands, customising an existing paid theme delivers the changes needed without the time and cost of a full rebuild. Custom builds are warranted when the brand's design requirements fundamentally cannot be achieved within any existing theme's layout structure.