Tableau has a feature to embed data views created in Tableau on web pages, internet portals, web applications, wiki pages, blogs etc.
The embedded data views are originally uploaded to the Tableau Server and their data is automatically updated on the web at regular intervals.
In order to access or use Tableau data views or worksheets or workbooks or dashboards on the web, the user needs to have proper licensing and access permissions from Tableau Server.
Therefore, a user who wishes to embed a Tableau view into a web page must have an authentic Tableau account.
That user can give access to other web users to view the Tableau data view by using the Guest user option. If we enable Guest user, anyone who accesses the web page can access the Tableau data view.