1. a thin rope or ribbon worn around your neck to carry something such as a whistle or identity card.

2. a rope or string, especially on a ship.

Lanyards are commonly used to display badges, tickets or ID cards for identification where security is required, such as businesses, corporations, hospitals, prisons, conventions, and trade fairs.

See some photos https://www.shundinggifts.com/types-of-lanyards.html