This is the 160th most frequent Spanish word.
social
Relating to society or its organization.
Here, 'social' modifies 'red' (network) to mean a platform intended for social interaction or communication.
La red social me ayuda a mantenerme en contacto con amigos.
The social network helps me stay in touch with friends.
Here, 'social' describes 'evento' (event) referring to occasions fostering socializing or community engagement.
Asistimos a un evento social el fin de semana pasado.
We attended a social event last weekend.
In this case, 'social' qualifies 'comportamiento' (behavior) to describe interactions and organization within a community.