Emoticons

6 clues
Faces on the Web
Cyberspace symbols
Text-message figures
:-( and ;-), for example
They often begin with colons
They may have smiles and frowns
Similar answers:
Beautyicons
Behemoth
Behemotheruption
Behemoths
Bottledemotions
Clanofthemoth
Computericons
Decepticons
Demotape
Demotapes
Demote
Demoted
Demotes
Demotic
Demoting
Demotingparents
Demotion
Demotions
Denouncemother
Desktopicons