I assume you are talking about the page and pageContext implicit objects available to a JSP.
The "page" is representative of your JSP (or rather the Servlet that it has become) that is serving the request, a synonym for "this". You wouldn't perhaps use this much. "pageContext" provides several convenience methods as can be read from the APi link provided above.
SCJP2, SCWCD 1.4, PMP, ITIL Foundation
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