Real-time geolocation services offer significant enhancements to app functionality by making user experiences more engaging and efficient. The guide emphasizes the importance of integrating geolocation features into applications across various industries, including gaming, logistics, social media, retail, and advertising, to provide users with seamless, location-aware experiences. It discusses the complexities and challenges of implementing geolocation, such as data accuracy, battery consumption, and selecting suitable map SDKs. PubNub is highlighted as a solution for efficiently streaming and managing real-time location data, allowing developers to focus on building applications without the burden of backend infrastructure. PubNub's scalable, reliable infrastructure supports real-time data transmission with low latency, providing tools like PubNub Functions for data processing and error correction, ultimately facilitating the creation of robust geolocation services in apps.