# Concepts

> The mental model behind Mark — workspaces, drafts, and review.

Source: https://docs.use-mark.com/concepts

Each business runs in its own workspace. Workspaces share nothing: one
business never sees another's posts, brand, or connections.

* **Workspace** — one business's data: its brand, its posts and schedule,
  and its connections to systems like Google or the social accounts it
  publishes to. You can belong to more than one workspace and switch
  between them.
* **Draft** — a post before it publishes. Drafts carry claims that need a
  confirmed source before they can be approved.
* **Review and approval** — see [Review and approval](/concepts/review-and-approval)
  for how a draft moves from written to published.

Mark maps onto your existing systems. It does not invent new fields,
statuses, or lists in your CRM.