This grammar point expresses purpose ('in order to') or reason ('because of', 'for the sake of'). When followed by に, it usually indicates purpose. Without に, it can mean 'for the sake of' or 'because of'. Connects to plain form of verbs and nouns with の.

目的（〜するために）や理由（〜のため）を表します。動詞や名詞に接続します。