Tableau has 4 main products.
Tableau Prep: Tableau Prep is responsible for preparing data for analysis. This tool provides 3 coordinated views which provide us with a complete picture of data.
Tableau Desktop: Tableau Desktop is the place where the analysis happens. It has a powerful drag and drops analytics which is very easy to use. Through desktop, you get your data insights quickly.
Tableau Online: Tableau Online is a secure and scalable self-service analytics cloud tool. You can use it anywhere, anytime and it has eliminated the complexities of IT.
Tableau Server: From small to large enterprises, Tableau server is used for fulfilling their BI requirements. This is an on-premise solution. This tool can take data from anywhere and shared across the organization through desktop or mobile browsers.