Used to highlight a certain circumstance or condition; 'when it comes to', 'if it becomes', 'in the case of'.
Long explanation:
The ~となると grammar point is used to highlight a specific situation or condition. It is mainly used to express 'when it comes to', 'if it becomes', or 'in the case of' in English. The formation changes depending on if it's used with verbs, adjectives or nouns.