This is the 1053rd most frequent Japanese word.
大人気
Extremely popular.
Indicates 'very popular' as an adjective emphasizing the store's acclaim.
このお店は大人気で、週末には行列ができます。
This store is very popular, and there are queues on the weekends.
Denotes 'becoming very popular', used to describe the increasing fame of the book.
彼の新しい本は今、大人気になっています。
His new book is now becoming very popular.
Shows 'extremely popular', specifying the demographic of popularity.