The Firstclub App referral code YGHDSD is often associated with a promotion offering a ₹500 cashback for new users.

Here is how you can typically redeem it:

• Download the App: Install the Firstclub App from the Google Play Store or iOS App Store.
• Sign Up/Register: Open the app and create a new account.
• Enter the Code: Look for an "Invite Code," "Referral Code," or "Promo Code" field during sign-up or in the "Wallet" section.
• Complete a Transaction: Most cashback offers require a minimum transaction or a specific action (like adding money or making a first purchase) to get the reward.

Since promotions change frequently, it is best to check the latest terms inside the app to confirm the current validity of the offer.