Geocoding is the process of converting addresses or place names into geographic coordinates and vice versa, and the Esri Geocoding Service facilitates this by offering features such as geosearch, reverse geocoding, and batch geocoding. With the Esri Geocoding BLOCK, developers can integrate real-time geocoding into applications on the PubNub network, which can be used for functionalities like mapping landmarks in a chat or tourism app. The article provides a tutorial on implementing basic geocoding in a real-time Angular 2 web application, highlighting the ease of enabling location-aware features using Esri APIs. It explains the setup process, including obtaining necessary developer keys and configuring the PubNub BLOCK for serverless cloud execution. Additionally, it discusses the simplicity of creating a user interface using Angular 2 and PubNub services, and points towards further capabilities of the Esri API, such as map customization, spatial analysis, and geo-enrichment, indicating the potential for deeper integration in future applications.