It is a specific directory on server in which the web contents are placed and can be seen by website visitors. The directories other that root may contain any sensitive data which administrator do not want visitors to see. Everything accessible by visitor on a website is placed in root directory. The visitor can not step out of root directory.
what does ../ or ..\ (dot dot slash) mean ?
The ..\ instructs the system to go one directory up. For example, we are at this location C:\xx\yy\zz. On typing ..\ , we would reach at C:\xx\yy.
Again on typing ..\ , we would rech at C:\xx .
Lets again go [...]