Basically "context help" means access to specific help information from within your application or web page. You can create context help links and calls to Help+Manual output in a wide variety of ways.
The options you have for implementing context-sensitive help depend on your output format, because different formats support different ways of making calls to your help files. This topic lists the different types of context help possible in the output formats supported by Help+Manual.
For more details on context-sensitive help, the available context-sensitive help technologies and implementation information for programmers see the Context-Sensitive Help & Popups chapter in the Reference section.