For this case we must first define what a social networking site is.
A social networking site are those sites to interact with people . Normally these sites are used to share photos, videos and news with friends, family and some close people.
Also these sites are used to meet new people.
As some people are not known, then it is unsafe to share personal information such like:
Phone number = número de teléfono
Answer:
Phone number = número de teléfono
