I use Sharepoint 2016 Standard in my day-to-day work as part of a team in an organization where I rely on it for document management and internal file sharing.
I use Sharepoint 2016 Standard for knowledge management as a central repository. In projects where I work with around two to three people, each team member prepares design documents, requirement gathering documents, and other documents including SOPs, manuals, and policies. Every document needs to be visible to all other members in that project, and we use Sharepoint 2016 Standard as a centralized place for this purpose. We also use it for workflow automation including approvals and other document review processes where we submit and upload documents. It primarily functions as a team collaboration site.