A good understanding of file types in Tableau can save you a ton of time. I've covered the key types and as new file types become available, I'll be updating this playlist.
In 2020.3 Tableau gave Prep the ability to write to database, ability to grant licenses on sign in, improved data connectors and a range of quality of life improvements for server, online and desktop. Jump in to find out more.
Relationships, relationships, relationships. That alongside metrics, set controls and improvements to previous features make this probably the biggest leap in any release in a long while.