noun which may take the genitive case particle 'no'
Used as a pre-noun modifier, often in compound terms like ヤング世代 (young generation) or ヤング向け (aimed at young people).
この雑誌はヤング世代に人気がある。
This magazine is popular with the young generation.
noun
Refers to young people collectively or a young individual, often in a trendy or casual context.
最近のヤングはスマホをよく使う。
Young people these days use smartphones a lot.