To take the initiative or seize the upper hand by acting before others (used in business, negotiations, competitions, etc.).
ライバル会社より先手を取るために、新製品の開発を急いだ。
To get ahead of rival companies, we sped up development of the new product.
サッカーの試合で先手を取ると流れがこちらに来ることが多い。
When you take the lead in a soccer match, the momentum often shifts in your favor.
トラブルが起きそうなら、事前に説明して先手を取っておいたほうがいい。
If a problem seems likely, it's better to explain in advance and take the initiative.