Which page are you taking about? Can you explain little bit more information regarding your query.
well, I need a webpart in my page displayed a message saying that the last update date, whichever date comes from the section of "modified" content and structure, for example display the message "This page was last modified 8/08/2013"
I can not post images in this chat forum does not allow me
Hi,
The easiest way to do this is just to use a content editor webpart/ script editor on the page and write simple javascript REST call/ CSOM call to get the current page attributes and display it. However, if this functionality is required for multiple pages, you can create a custom visual webpart and use the same javascript code or a simple server side code to display it.
Narahari
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