You can manage site by adding pages or labels in the site navigation tree or adding portlets on page.

通过在站点导航树中添加页面或者标签，或在页面上添加Portlet，您就可以管理站点了。

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Once a page is labelled, then clicking on the label's name allows you to browse other pages with the same label, or view related labels that commonly occur on the same pages.

添加过标签的一个页面，点击标签的名称就可以允许你浏览相同标签的其他页面，或查看出现在同一页面上的有关标签。

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The Gmail feature called "smart labels, " which now is available for users who choose to switch on the feature through the Gmail Labs page, automatically sorts e-mail into groups to make it easier -- and hopefully less stressful -- for to users to manage their overflowing inboxes.

CNN: Google 'smart labels' aim to de-stress e-mail