difference between wtpwebapps and webapps folder in tomcat

when I run my dynamic web project from eclipse it gets deployed to wtpwebapps. However I want to deploy a war file to tomcat so when I checked here in SO this came up How to deploy a war file in Tomcat 7

It says I have to deploy to webapps folder in tomcat.

Can anybody please explain me the details between wtpwebapps folder and webapps folder in tomcat and also if I can deploy war files to wtwebpapps folder instead of webapps folder.