Tableau is a business intelligent tool that can helps companies to understand their business data. 

There are 5 significant things tableau can do for you

1. Analysis: Analyze data by filter it and drill it down quickly to determine patterns and trends.
2. Visualization: It changes the business data into a beautiful  presentation dashboard, empowering the businesses to make informal decisions
3. Collaboration: You can share a Tableau dashboard with your workers by setting up a Tableau server, which can be accessed online or publicly 
4. Intuitive Drag-and-drop interface: no need writing coding, Simply click and drag the chart over the desired area, and it will be automatically placed.. It’s user-friendly interface
5. Data connection: Users can connect to various data sources, including Excel, databases like SQL and Oracle, cloud applications like Google Analytics and Salesforce, and more.

There are a free training videos for beginners. Click on this link for watch. Click and Watch now