Adobe Illustrator is a professional vector-based design and drawing program. Used as part of a larger design workflow, Illustrator allows for the creation of everything from single design elements to entire compositions. Designers use Illustrator to create posters, symbols, logos, patterns, icons, etc.
Drawing programs such as Adobe Illustrator create vector graphics, which are composed of lines and curves defined by mathematical objects called “vectors.” Vectors describe a graphic according to its geometric characteristics.
Illustrator is used often to create logos or anything that may need to be printed or displayed at different sizes. A vector graphic will never lose its quality if it’s scaled up or down. Illustrator will also give you a better print output since it’s not resolution dependent. A drawback of Illustrator is that it can’t be used easily to modify images that are already created, since there are limited filters and image editing tools available to you.