What Does Cached Data Include? I have 6.1 gb of cached data on my phone and I would like to clear it, but I'm not sure what is "cached data."  Would this reset the games I have on my phone?  Other things?

What does cached data include?
CACHED DATA could contain : 


Precompiled applications to make them faster
Saved databases
Downloaded images/webpages from your web browser
Data to be copied by some apps
Thumbnails (light preview of images for faster rendering)


You can clean it whenever you want. Since you have 6.1GB I bet it comes from your web browser.