The phrase implies someone's network includes powerful individuals who can grant favors or opportunities. She got the project approved quickly because she has friends in high places.
Pro Tip 2/3
Indirect Benefits
It suggests gaining advantages through associations rather than personal abilities or achievements. Nick suddenly got promoted; having friends in high places must have helped.
Pro Tip 3/3
Social Context
The phrase is often used when discussing social status or connections within institutions or industries. Despite her junior level, she's involved in major decisions, likely because she has friends in high places.