Hi there, Im currently working on developing a website that will have more than 10.000 destinations in its database. All the destination will have from 0 til 10 subpages. All these subpages can be edited by its members, kind of in a wikipedia way, just heaps more simple. I want Google to take notice of every change made on the site, but since there is so many sites I worry that it might take time before the crawlers manage to scan that deep - so I need a sitemap to tell Google whenever there is a change. To make things easier, lets say there are only two destinations on my site, australia and mexico. There are also only two users, userA and userB. userA goes to travel.com/mexico and edits a subsite called "Things to do". A new url is generated (travel.com/mexico/things_to_do). Ok, so thats simple - I just include that URL in the sitemap. Then userA does the same thing for the australia destination and the subpage travel.com/australia/things_to_do is made. Again, I just add it to the sitemap. BUT.. then comes userB into the picture and add some information to travel.com/mexico/things_to_do and travel.com/australia/things_to_do ! How do I add that do the sitemap? Do I just re-add the URLs? Do I delete the old one so it doesnt appear twice in the same sitemap? In summary, How do I make Google re-check an URL that have just been submitted to the sitemap, if the content on that spesific URL has been updated? Do I just add the URL again?