Tableau can be an intuitive tool for experienced analysts; however for many new users, training would be essential before they could enjoy the full potential of the tool. Keep in mind that you will have to invest some time, and often money, for your employees and yourself to learn how to get most out of Tableau and go beyond basic queries. Luckily, Tableau (and not only!) provides rich sources of training materials:
Tableau tutorials (video) on their site. There are over 80 videos that guide through getting to know Tableau. Tutorials help users become more skilled with advanced analytic and visualization capabilities
Training playbooks like the “Starter Kit” offer a self-paced learning environment for users to become comfortable and productive with the software
Live Online Training . Live online training allows you to choose your topic for one-hour live, instructor-led webinar with audience Q&A.
Tableau certification is offered through various Tableau training classes.
There are also data visualization courses on the web that can help you get started with the tool and pick up basics. For example, Data visualization with Tableau course on Coursera teaches you to structure your data analysis projects and streamline them effectively to design meaningful “data stories” using Tableau. As a nice bonus, this course comes with a 6-month Tableau license.