Amazon affiliate links last for 24 hours. After 24 hours the link expires. You must make sure to update links regularly. If a customer clicks on the link within 24 hours they are tracked. If they make a purchase you earn a commission. After 24 hours the tracking expires. You should always keep links fresh and active. You can check your affiliate dashboard for link performance. You must be aware of any changes to Amazon’s policy. Always ensure your links are relevant and up to date. Keeping your links valid helps increase your chances of earning commissions.