Performance best practices for Shopify themes

Performance is an important factor for merchants when they choose a theme for their online store. When you build or customize a theme, you should build with performance in mind. Optimizing your theme for performance is key to the success of the merchants that you support and to the experiences of their customers. Performance directly influences conversion rates, repeat business, and search engine rankings.

When a theme is submitted to the Shopify Theme Store, the theme's tested on a benchmark shop to determine its performance score. To be accepted into the Shopify Theme Store, a theme must have a minimum average lighthouse performance score of 60 across the home page, product page, and collection page. You can run a similar test on your theme using a development store.

Learn more about performance testing for themes in the Shopify Theme Store.