From your Shopify admin, go to Online Store > Themes.
Find the theme that you want to edit and click Customize.
In the left-hand toolbar, click Theme settings.
Click Social media.
Configure image to share your site on social media. Except for sharing the product, collection, article because the featured image of a product, collection, or article will be used.
Configure platforms are used to share products, articles.
Add your social account that customers can reach you on social platforms. These social accounts will be shown as social icons in the header or footer.
Twitter: add your Twitter page. Example: https://twitter.com/boostheme
Facebook: add your Facebook page. Example: https://facebook.com/boostheme
Pinterest: add your Pinterest page. Example: https://pinterest.com/boostheme
Instagram: add your Instagram page. Example: https://instagram.com/boosthemeteam
Tumblr: add your Tumblr page. Example: https://tumblr.com/boostheme
Snapchat: add your Snapchat page. Example: https://snapchat.com/boostheme
Youtube: add your Youtube page. Example: https://youtube.com/boostheme
Vimeo: add your Vimeo page. Example: https://vimeo.com/boostheme