Tableau is a data visualization tool used to create interactive, graphical visualizations of data. It allows users to quickly and easily explore and analyze data, uncover patterns, and create visualizations without needing to know any coding or programming.
For example, a user could use Tableau to create a bar chart to visualize the sales of different products over the course of a year. The user could then interact with the chart to filter and drill down to look at the sales of specific products in specific regions or over specific time periods.