The document discusses how smartwatch notifications can improve customer engagement for brands. It notes that smartwatches allow for faster awareness of notifications and briefer interactions. Notifications on smartwatches act as a gateway to encourage users to engage further on other devices. The document also outlines challenges like limited screen space and brief attention spans. It argues that biometric data collection could allow more contextual messages but may also be seen as intrusive. Overall, the document promotes smartwatch notifications as an opportunity for targeted campaigns if challenges around format and relevance are addressed.