Usability impact: According to several studies, people prefer short URLs.

对可用性的影响：据一些研究报告，人们更喜欢短的URL。

youdao

Why does CNN, which has a natural URL that is already very short, not just make its own short URLs?

CNN本身的网址就很短，那为什么不使用自己的短网址呢？

youdao

People add a lot on links on Twitter posts but space constraints (140 characters per post) require short URLs.

人们需要在Twitter里面添加大量的链接，但是一条Twitter信息只允许包含140个字符，所以人们需要URL缩短服务。

youdao

Consider online tools, like Unfurlr, that show the long URLs hiding behind short URLs and provide a security report assessing the safety of the underlying web site.

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