If you've downloaded and/or purchased a new Shopify theme, you may need to publish it for your customers to see the changes. You can publish or unpublish themes from the Themes page of your admin. Before you can publish a theme, it must be already installed.
To publish a theme:
From your Shopify admin, click Online Store, and then click Themes (or press
Scroll down to find installed themes that are not published. Find the theme you want to publish and click its Publish theme button:
Click Publish to confirm:
The theme you chose is now published. The theme you previously had published is now an unpublished theme.