The conditional form of 'する' meaning 'if (one) does (so)' or 'in that case'; used to state consequences or give advice based on taking an action.
そうすれば問題は解決するだろう。
If you do that, the problem will likely be solved.
もっと勉強すれば合格できるよ。
If you study more, you can pass.
計画を変えれば、経費を節約できる。
If we change the plan, we can save expenses.