When sharing links with friends, long URLs can cause issues as they take up a lot of space in tweets and text messages, and can wrap across multiple lines in emails. You can use one of the many free URL shortening services to turn any URL into a very short one. These will redirect to the original page. The danger in using URL shorteners is that you can't be certain where a link leads. But browser extensions and the URL shortening services can help with that.
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