[rajan]

to refers direction.
for refers cause / because (reason)

this work is important to me. (it can be important to me / you/ them - But it is important to me It is telling direction or giving indication in the direction of "me")
This work is importat for the society. (cause)
Sorry for being late. (because I was late)

Originally Posted by silviasabater_2000

Hi there,

I do not know when I should use "important to" or "important for".
For example in the sentence "other people's opinion is very important (to or for??) you.
Could anybody help me?

Thanks