It was a real novelty, being able to contact family and friends at a moment's notice, when and wherever your were. Social media sites on the internet have been all the rage for the past few years.
But as with many new crazes over the years, there are signs that we're getting fed up of Facebook and tired of tweeting.
Is it the end of an era, or the start of another one? Andrew Pate speaks to "Techno Gran" Brenda Meakin and Lisa Harris and Fiona Harvey from University of Southampton.