The Charge theme makes it easy for your customers to share your store content across the most popular social channels. You can show social share icons on the product page and choose which ones to display.
To add a social share button on the product page, go to Online Store - Themes - Customize - Product page and select the Product Information section. Here you should click on Manage Stock and put a check box in Show social share icons.
To select which social icons will be displayed on the product page, go to Theme Settings - Social Media - Social sharing options and put a checkbox in the wanted fields.
The option is enabled by default. In case you want to get rid of the social media buttons on the product page, go back to general theme settings and deactivate the checkboxes.