这究竟是什么含义啊？

Logic optimization can include upsizing of gates, buffer insertion, and logic duplication, which can increase utilization. DFM can include diode insertion, which increases utilization. It is a good idea to allow a 10-20% margin between the original starting netlist utilization and the expected final utilization at tape-out.
究竟是什么意思呢?究竟是怎么做啊?

就是解释软件工作的

就是说所有的优化工作可能增加10%~20% 的利用率。