〜にとって
For, from the standpoint ofmachine translation
FormationNoun (person／organization) + にとって
Noun + にとって opens up a viewpoint or standpoint: "for A, …". What follows is an EVALUATION or judgment — often adjectives like 大切、難しい、必要、大変: 私にとって家族は一番大切なものです (for me, family is the most important thing). The preceding noun is almost always a person or an organization.
This is the easiest place to lose points in the "toward/for" group: に対して goes with an ACTION directed at a target, にとって goes with an EVALUATION. "Difficult for me" is 私にとって難しい, not 私に対して難しい; "she is kind to me" is 私に対して親切だ, and にとって is not used there. As for について, it merely introduces a topic ("about") and has nothing to do with standpoint.
Also don't confuse it with として: として attaches an objective CAPACITY or role (留学生として — as an international student), whereas にとって only says "seen from someone's side." Emphatic forms: にとっては、にとっても.
Examples
私にとって家族は一番大切なものです。
For me, family is the most important thing.
外国人にとって漢字を覚えるのは大変です。
For foreigners, memorizing kanji is very hard.
この経験は私にとっていい勉強になりました。
This experience was a valuable lesson for me.