Dive summary: 

• The average life of a tweet is a few minutes, a Facebook post a few hours, but according to a recently released study from Piquora, a Pinterest pin's life is thousands of times longer. 
• Although 70 percent of clicks will happen within the first two days of posting, a pin will continue to receive clicks for 30 or more days. 
• The difference lies in the way users use the social networks; on Facebook and Twitter the news is being fed and there is sense of immediacy, with Pinterest users are browsing, searching, and lingering. 

From the article: 

"Verma, who used to be a director of product management at Yahoo Search, says that when web surfers go to Google and search for something, if they don’t see it in the first page of results, they think Google 'didn’t get' what they meant, so they go back and reformulate their query. That doesn’t happen on Pinterest.

'On Pinterest, there’s no next page,' Verman says. 'Just infinite scroll … so if you keep scrolling, you see a lot of pins, including older pins.'”