A "permalink" is a permanent link that will link to a specific piece of content such as a blog entry even after the content has passed into the website’s archives. If you've enabled permalinks for a module, such as Blog, Events or a custom module, there will be a Permalinks tab in that module.
To enable permalinks, go to the Green Interface's Toolbar module and edit the module you want to add permalinks to. Near the bottom of the options for the module, there will be a Permalinks checkbox. Check this box to enable permalinks. Now, when you open the module in Blue, you will see a Permalinks tab.
To allow users to permalink to your site, you have to make sure that the permalinks control widget is in the module layout(s) for the module. This will create a permalink on the blog, news article or custom module item.
In Blue, the Permalinks tab shows you all of the items that visitors to your site have created permalinks to.