why are redeeming codes important?

Redeeming codes are an option for everyone to use. If you play TCG Live, the codes will give you card packs or something else (It will tell you at the bottom of the card what the code will give you) to open on the app so you can build decks and play against other people. However, if you don't play TCG Live, it isn't that important for you to redeem the codes.

Hope this helps!

Redeeming codes in Pokémon games are crucial because they offer players access to exclusive items, rare Pokémon, and in-game rewards that can enhance the gaming experience. These codes provide opportunities to obtain items that might be difficult to acquire otherwise, giving players an edge in battles or completing their Pokédex. Just like how a rare leather pullover adds a unique style to your wardrobe, redeeming codes add exclusive value and unique perks to your Pokémon journey.