Using no tools other than a web browser, users with the appropriate access permissions can change web site content on enabled pages simply by clicking on the text they wish to change, typing the revised text on the screen and selecting “Save”. 

Changes made in this way are updated to the web site immediately, and made available to all site visitors as soon as the 'save' button has been pressed.

What can be updated? - Not only can you change text content, but you can reformat text simply by clicking on one of the formatting options available and instantly change the text colour, font type or size.  Graphics can be updated also.  Select the graphic you wish to change and then simply select your new graphic from your hard drive or network, click save and instantly the new graphic has replaced the original and the whole world can see it.