A:Answer Hi there,
It is the Smart Connect LED indicator, to learn more you can check the link below and see pages 16-17 (Using the Smart Connect feature) for reference.
User manual:
https://downloadcenter.samsung.com/content/UM/202312/20231228151644561/O_01._DG68-01089A-07_IB_FULL_NA30N6555TG_EN.pdf
Have a great day,
-Ernest-