AI

An AI file is a drawing created with Adobe Illustrator, a vector graphics editing program.
 

EPS

A graphics file saved in the Encapsulated PostScript file format also includes an embedded preview image in bitmap format.
 

You can use JPEGs for projects on the web or for projects that require printing at a high resolution. 
 

PDF

A PDF file is a multi-platform document created by Adobe Acrobat or another PDF application. The PDF format is commonly used for saving documents and publications in a standard format that can be viewed on multiple platforms.
 

PNG

PNGs are great for interactive documents such as web pages, but are not suitable for print. Use these files for easy editing and transparent backgrounds!
 

SVG

A Scalable Vector Graphic file can be scaled to different sizes without losing quality. This is most often used for website graphics, as they can be resized to fit different design needs.