If you have installed the Smart RSS feed app, you probably have your blog RSS feed URL. In case you don’t have this, please visit the App Dashboard.
If you want to auto-post your Shopify Blog articles to Blogger, you need to use the RSS feed URL with a service such as RSSGround.
If you want to auto-post your Shopify Blog articles to WordPress, you need to use the RSS feed URL with a RSS to post plugin. There are several plugins available. You can find them at below URL: