WCS Data Cache

Data that is cached by the WebSphere Commerce data cache can be configured by using either the command caching or DistributedMap objects configuration methods. For the best performance, use DistributedMap object cache configuration. Command caching configuration is provided for compatibility with earlier versions only.

PFB the below link to know more about WCS Data Cache:
http://wcs-tips.blogspot.in/p/enabling-wcs-data-cache.html

WCS Caching

Caching means temporary storing area for data. When we cache a data, the second request to fetch the data will not reach the server; it will fetch the data from the cache itself saving the time, network and the additional traffic. WCS provides a good support for dynamic caching. To know kore about the same, check the following link.

http://wcs-tips.blogspot.in/p/blog-page_23.html