Crown Shards are one of Fall Guys' in-game currencies. They were introduced in Season 4. You can earn Crown Shards by completing daily challenges, or winning an episode of Squads Show, Squads Duos or Squads Trios.
Earning 60 will grant the player 1.
If Double Crowns are enabled and the player earns a crown from accumulating 60 shards, the extra crown will not show up in the results screen, but will still be doubled.