You can read about all data types supported by Alteryx.
https://help.alteryx.com/current/designer/data-types
This is a description of WString
I am not sure if this fully answered your question but this page is first step for me if I want to read more about data types in Alteryx.
Hi @krunalprajapati26 ,
W stands for Wide and you can find more about those different data types from the following table
taken from this link of Alteryx help pages
https://help.alteryx.com/current/designer/data-types
