Did you know your tweets have a half-life of three hours? According to Bit.ly, you’ll get half the clicks on your tweets in 2.8 hours and then from there it’s all down hill. With Facebook, you have 3.2 hours.
That doesn’t mean those links are dead. It means you’ll see a gradual decline in links after that half-life has expired. The recommendation is for you to submit “second chance” links to allow other followers who didn’t see the first one an opportunity to see your links. That’s a suggestion made by Danny Sullivan of Search Engine Land.
There’s another reason you want to send out these “second chance” shares as well. You want to test another teaser message.
Remember, what you say (the reason you give for your followers needing to click a link) about a link determines to a great degree whether or not a link is clicked on. With a second chance share, you can test another teaser and capture clicks from people who saw the first link but weren’t intrigued by your teaser message.
Either way you look at it, tweeting and sharing the same information more than once is becoming a common practice. I’ve seen marketers share the same message across multiple days. The reason they do so is because they get more click-throughs.