She acted as a go-between to help the two sides reach a settlement agreement.

go-between 是由动词 go（去）和介词 between（在...之间）组成的复合名词，字面意思是"在两者之间往来的人"。 go-between 指在双方之间传递信息、协调沟通的中间人或调解者，通常是为了促成协议或解决争端。