Coastal areas are crucial for biodiversity, economies, and natural disaster protection, but are vulnerable to climate change and unsustainable development. Satellite data and geospatial information help to monitor coastal changes, including erosion, sea-level rise, and sedimentation. Advanced remote-sensing technologies such as optical sensors and radar data provide high-resolution imagery, whereas manual digitization and machine-learning techniques aid in shoreline extraction. Incorporating shoreline data into development plans is essential for evidence-based planning, aligning with sustainable development goals, and adaptive management. Challenges include data accuracy, accessibility, and capacity building, whereas future trends involve advanced satellite technology, artificial intelligence integration, and expanding applications such as augmented reality and virtual reality.