Samsung GH59-15385A CON TO CON FPCB is a main-board flex cable used as a replacement component when repairing a compatible phone. Its name identifies it as a board-to-board flex connection, making it a specific internal interconnect part rather than a general-purpose cable.
The listing identifies the part for the Galaxy S20 Fan Edition SM-G780 and Galaxy S20 Fan Edition SM-G781 5G. It is intended for repair work on those compatible phone models, where the corresponding flex cable needs replacement. The exact part number is GH59-15385A.