So what's the big deal with search terms? This may seem unnecessary in a world with Google but for scholarly, authoritative research you'll need to utilize library databases. With databases, you will need to use the appropriate search terms.
What will search terms do for you?
Identify the key concepts in your topic:
The effect of social media on bullying behaviors among U.S. teenagers.
Brainstorm for related terms:
social media OR facebook OR sns OR social networks
bullying OR aggression OR school violence OR cyberbullying
U.S. OR USA OR United States
teenagers OR teens OR youth OR adolescents