WebHelp
Webhelp is a type of online help delivered through the Internet. A well-known example of such a system is WebHelp.com. This approach, mixing internet and local resources, is also used in Windows XP's Help and Support feature.
The advantages of web help solutions are that they permit content to be continually updated and that they sometimes give prospective buyers a deeper preview of products. Web help can be considered as a cross-platform solution since it can be viewed using a regular internet browser, while local online help runs only on a help viewer, and often only on a specific platform.
However, there are some disadvantages to WebHelp. The main disadvantage is that it is more cumbersome for the user than purpose-designed help applications, as it may become difficult or impossible to access depending on the user's Internet connection. Also, it can be difficult to effectively implement context-sensitive help with web help.
(Compiled from Wikipedia)