Social networks are extremely efficient means for reaching the right people (from new employees to customers and influencers). Moreover, they create a strong bond within the internal organisation.
The use of social media is often concentrated around a few people or is centrally controlled. This way you can miss the usefulness of the network of many loyal employees, customers, clients.
'Share the content' offers the possibility of efficiently distributing social media content to so-called 'ambassadors' who are then able to share these messages very quickly (2 clicks rule) through their social network of choice.