Here the official meaning of those symbols:
sexuality References to explicit depictions of sexual behavior, possibly including nudity
violence References to scenes involving aggressive conflict, may contain blood scenes(realistic blood, gore, weapons, and depictions of human injury and death) / PvP or PK
fear/horror/threatening References to horrifying action
language References to inappropriate language (sexual, problematic social messages, abusive language, etc.)
alcohol, tobacco, drug Reference to images of alcoholic beverages, tobacco products, illegal drug use
crime,anti-societal or anti-governmental messages Reference to images of crime, anti-societal or anti-governmental messages
gambling(betting) References to gambling or betting (speculation), simulated gambling