In Tableau what is a worksheet?

A worksheet, or sheet, is a single canvas holding one view. You build it by dragging fields onto shelves and choosing a mark type.

One sheet produces one visualisation. Where you want several together, you build them as separate sheets and combine them on a dashboard.

Sheets are what dashboard actions connect — a filter action passes a selection from one sheet to another — and they can be shown or hidden when publishing so a dashboard publishes without its component sheets cluttering the Server.

Tabs at the bottom of the window distinguish sheets, dashboards and stories by icon.