To track conversions across different devices, you need to connect user behavior using tools that can follow the same person from one device to another. This usually involves using tracking systems like Google Ads cross-device tracking or Facebook’s conversion tracking, which rely on user logins or cookies. When someone clicks an ad on their phone but completes the purchase later on a laptop, these tools can still connect that action to your ad. It’s also helpful to use UTM tags and set up proper tracking in your ad and analytics platforms. This gives a clearer picture of how your ads are performing and where the conversions are really coming from. Have you tried any tools that help with this?