According to Wikipedia, a missed connection is an occurrence where two or more people are unable to exchange contact information or the information that is exchanged is lost. These missed connections are generally associated with romance, but they may also be business-related or otherwise. Through the use of publications and websites some people seek to reconnect with their missed connection.
The authors find there’s something poetic about this desperate hope for the reencounter, but also something very ironic about using the internet as the tool to achieve it. It turns out that in the era of social media, when we’re supposedly connected to anyone in the world, the network of missed connections is one of the most inefficient ones.