If you use Twitter, you’re probably familiar with so-called shortened URLs, which are a method for streamlining a link so it can fit in Twitter’s 140-character limit. While shortened URLs are handy for sharing information via Twitter, they can also be dangerous.
Even if you know the person who has posted the link, it’s a good idea to proceed with caution. When you see a shortened link you do not know what the actual Web address is until you click. Scammers often use shortened URLs to lead victims to a malicious software, or “malware,” website.
Thankfully, you don’t have to skip the links your friends share. But you should take the extra step of expanding the link to see the full address before clicking on it.