Tableau Server
Ask Data is without a doubt one of the most important new features of the 2019 releases. However, the change that everyone will directly spot is the totally new browsing experience, with a new way to group published content and a fresh look.
New browsing experience (2019.2)
Tableau Server 2019.1 introduced Mixed Content. This new way of grouping content mixes data sources, Workbooks, flows, and sub-projects in the same view of a project. Say goodbye to different tabs for each content type. Now, you can see everything at the same time. For example, here's the view of a project, World Indicators, that contains a sub-project, Workbooks, and a data source:
Tableau Server 2019.2 pushes this change further with a totally new look and feel when navigating on Tableau Server. The new Home page displays your recently used content, your favorites, and what other Tableau users are viewing. The top menu has also totally disappeared to leave room for a new left navigation pane. Don't be afraid – the options are still the same. Here's the new Home page:
As you may have noticed, if you click on a data source, a strange and new tab will open. I said strange, but I should have used the word awesome. This is Ask Data.