People switch between phones, tablets, and laptops all the time, so tracking across devices helps capture the full customer journey. This means affiliates get credited fairly when a user clicks a link on one device but buys on another. It can boost trust and motivation among affiliates since their efforts are properly rewarded. Plus, it improves data accuracy, making marketing insights more reliable. On the downside, it might add some complexity to the setup and potentially raise privacy concerns if not handled carefully.