This is the 108th most frequent Portuguese word.
sociais
Relating to society or social.
Here, 'sociais' modifies 'redes' (networks), indicating that these are networks related to social activities or interactions.
As redes sociais são populares entre os jovens.
Social networks are popular among young people.
In this context, 'sociais' describes events that are designed for social interaction or communal purposes.
Os eventos sociais promovem interação entre os participantes.
Social events promote interaction among participants.
'Sociais' is used as an adjective describing 'ciências' (sciences), indicating sciences that concern social subjects or aspects.