Front-end Delivery Options
Native BigCommerce
Bigcommerce offer 2 options to develop a front-end hosted on their servers - Blueprint and Stencil (Handelbars)
Headless Storefront
All data is fetched form Bigcommerce backend and then online store is populated via combination of content coming from Bigcommerce and eventually other systems like PIM or CMS used by marketing department to build landing pages and marketing collateral offers best platform independency and reduce the vendor lock significantly