Fans of the massively popular "Witcher" video game series, itself revitalized by the release of the Netflix show, are well aware that Geralt wields two swords: one made of steel and one coated in silver. The TV show, however, differs from the video game series in that Geralt often leaves his silver-coated sword behind with his horse, Roach, wielding only his steel sword in most situations. Fans of just the Netflix show, then, may not have noticed that Geralt does indeed own two blades.
Nevertheless, the reason for Geralt's dual sword ownership is tied directly to his job as a Witcher. A silver-coated sword is better suited to slaying monsters, while a steel sword is dedicated to combat against human enemies. Thus, whenever Geralt leaves his silver sword behind, it's an indication that he doesn't expect to encounter any monsters for the duration of his time away from the blade. By contrast, his steel sword is his near-permanent companion, given that conflict with fellow humans seems to be a common occurrence in the world of "The Witcher." It's still entirely possible that both swords could see equal use in upcoming seasons, with so many creatures and characters still not mentioned in the show.
