SBNav stands for StageBloc Navigation. Used for StageBloc hosted sites, SBNav typically appears in the corners of hosted sites as a square grey icon with the StageBloc "SB" logo.
SBNav adds a lot of built-in functionality to hosted sites by handling communication between the hosted site and platform. It powers the shopping cart and allows users to follow and share an account, discover more accounts to follow and edit their user profile.
To hide SBNav from a hosted site, you may white-label your site via the Hosted Site settings modal. Once removed, we recommend working with a developer to extend your hosted site's theme to support some of the more advanced functionalities typically provided by SBNav.