What is InDesign
Adobe InDesign is a desktop publishing and typesetting software application, developed by Adobe Systems.
InDesign is a vector-based program, meaning that it maps artwork on a mathematical grid. As a result, the artwork is scalable, meaning that it is possible to resize the file as small or as large as you want without losing the quality of the picture or making it grainy. It can be used to create designs for brochures, posters, newspapers, flyers, presentations, magazines, books and ebooks.
Production artists and graphic designers are the principal users, creating and laying out posters, print media, and periodical publications.