What is ornamentation?

(Music related)

please give a long explanation, thank you

Ornamentation, in music, the embellishment of a melody, either by adding notes or by modifying rhythms.

In music, ornaments (or embellishments) are musical "flourishes"— usually added notes—that are not usually needed/essential to carry the overall line/pattern of the melody, but are used instead to decorate or "ornament" that line, add extra interest and variety, and give the performer the opportunity to add expressiveness to a song or instrumentation.

Explanation:

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