Web Maps are interactive displays of geographic information you can use to tell stories and answer questions. The professionals who create data and maps using ArcGIS share their work at ArcGIS Online, where Web Maps are created and shared to be used by a wide audience for many purposes. Web Maps are how most people will experience GIS.
Web Maps are special because just one Web Map can be shared and used in so many ways and on any device. This diagram illustrates the power of where one Web Map could be used.
Anyone can use or create a Web Map in ArcGIS Online in a web browser. Here are some tutorials to help get you started:
You can also start using Web Maps by downloading the ArcGIS application for your smartphone or tablet. You will need to use a browser to create and register your account, and then supply your account information to sign in to the application.
Whether you're using a browser or mobile device, once you're signed in, you can explore Web Maps. Esri recommends that you search for groups that match your interests or needs and join those groups to find useful content quickly.