What different products Tableau provide?

The main products are:

• Tableau Desktop — the authoring tool, on Windows and macOS. - Tableau Server — self-hosted distribution, permissions and scheduling. - Tableau Cloud — the same, hosted and managed by Tableau. - Tableau Public — free hosting, with everything published visible to anyone. - Tableau Reader — free desktop application for opening packaged workbooks. - Tableau Prep — data preparation and cleaning, building repeatable flows.

Desktop historically came in Personal and Professional editions, the difference being that Personal connects only to file-based sources and cannot publish to Server.

The point worth making about Public is that it is genuinely public — it should never hold corporate data, which is a question interviewers sometimes use to check you understand the distinction.