What is Geographic information system :-
ArcGIS is a geographic information system
working with maps and geographic information.
It is used for creating and using maps, compiling geographic data, analyzing mapped information,
sharing and discovering geographic information, using maps and geographic information in a range
and managing geographic information in a database.
ArcGIS is a platform for organizations to create, manage, share, and analyze spatial data.
It consists of server components, mobile and desktop applications, and developer tools.
This platform can be deployed on-premises or in the cloud (Amazon, Azure) with ArcGIS
or used via ArcGIS Online which is hosted and managed by Esri.