As nouns the difference between importance and advantages
is that importance is the quality or condition of being important or worthy of note while advantages is plural of lang=en.
As a verb advantages is
third-person singular of advantage.
importance
English
Noun
(-)
The quality or condition of being important or worthy of note
significance or prominence
personal status or standing
advantages
English
Noun
(head)
Verb
(head)
(advantage)