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