But for one British man, Facebook is the reason he has been reunited with his son after 25 years.
Former soldier Darren Goddard, 48, was about to delete his unused account when the life-changing post popped up.
His son Lewis Helget, 27, who he last saw when he was just two years old, was searching for him.
The 48-year-old from Basingstoke, Hampshire, told the Daily Mail: "I opened up my Facebook to shut it down and get rid of it and then Lewis was there and it said he had been looking for his father for four years."
Lewis lives in Emsdetten, Germany, where he was raised by his mother Aggi. Darren, who was posted to Germany, had not seen his son since his marriage to Aggi broke down in 1989 and he returned to the UK.
After a quarter of a decade, father and son were finally reunited last month, thanks to the Facebook page Darren's daughter had set up for him three years ago.
Though he'd never used the social media site, Darren says his life is now "complete" because of it.
He added: "Lewis has always been in my heart and I have never stopped thinking about him."
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