Question: I am using Tridion 2009 SP1 for a client, we have jsp pages and vb script. Our client wants to switch to Tridion 2011 and have told to investigate Experience Manager. I tried searching on sdllivecontent but could find anything with this word. Can anyone direct me what actually is Experience Manager so that i can get back to client and estimate the efforts required when i migrate to Tridion 2011

Answer: 
Experience Manager is the product formerly known as the SDL Tridion User Interface (UI) update, formerly known as SiteEdit.

You can find information on Tridon World for UI Update 
(<https://www.sdltridionworld.com/downloads/documentation/UIU4SDLT2011SP1/index.aspx>) if you have access, as well on SDL Live Content
(<http://sdllivecontent.sdl.com/LiveContent/content/en-US/UIU4SDLT2011SP1/concept_EDC411EF58BD4700A8B6BD996AB102F3>).

I suppose the reasoning behind the re-renaming of the product is due to its becoming more integrated into the main Content Manager Explorer interface.
The name *Experience Manager* (we usually abbreviate it here as XPM) is really only used in the official documentation on the latest release, version 2013. Before that (version 2011) the documentation refers to it as *user interface update for SDL Tridion 2011 SP1* which is basically the same as *SiteEdit* was for version 2009 and before (be it that XPM comes with added features).

You can find it in the online documentation for SDL Tridion 2013 under [Content Manager clients](http://sdllivecontent.sdl.com/LiveContent/content/en-US/SDL_Tridion_2013/concept_1090E3E576634CB2BE890CCDE15D2299) ([requires login](http://docportal.sdl.com/sdltridion))

For the details of the implementation on SDL Tridion 2011, you can use [Welcome to the user interface update for SDL Tridion 2011 SP1 documentation](http://sdllivecontent.sdl.com/LiveContent/content/en-US/UIU4SDLT2011SP1/concept_EDC411EF58BD4700A8B6BD996AB102F3) ([requires login](http://docportal.sdl.com/sdltridion))

Also Ryan Durkin has written a nice article with a very complete overview of it all: <http://blog.building-blocks.com/sdl-tridion-user-interface-2012-overview>