Your Magento theme should already be ready on your store. However, before launching your store's new theme, there are a few things we need to do, such as:
Your theme should already be set to display on your Magento store. However, if it isn't, then go to the Configuration option under System in your store's administration panel, as shown in the following screenshot:
From here, select the Current Configuration Scope, and make sure it is set to Main Website as seen in the following screenshot:
Under the Design tab to the left of the screen, you can now set the Themes setting to the name of your new Magento theme.
Once you've saved these settings, you should see your new Magento theme on your store.
If you turned template path hints On while you were creating your Magento theme, then you'll need to turn these off before launching your store. You can do this from the Configuration panel located under System in your administration panel's navigation. From here, select the Developer tab under Advanced.
Lastly, we can turn the system cache on. This helps to reduce the load on the server that your Magento store resides on. In your store's administration panel, select the Cache Management option under the System option in the navigation.
Once the Cache Management dashboard has loaded, select the Enable option next to All Cache, and click on the Save cache settings button.