Uses
Because many different hanja—and thus, many different words written using hanja—often share the same sounds, two distinct hanja words (hanjaeo) may be spelled identically in the phonetic hangul alphabet. Thus, hanja are often used to clarify meaning, either on their own without the equivalent hangul spelling, or in parentheses after the hangul spelling as a kind of gloss. Hanja are often also used as a form of shorthand in newspaper headlines, advertisements, and on signs, for example the banner at the funeral for the sailors lost in the sinking of ROKS Cheonan (PCC-772).
Read more about this topic: Hanja