What is the main purpose of the Artwork Submission page?

Its main purpose is to help customers understand and act on Production-Ready Artwork. Submit editable Adobe artwork at 10% or 100% scale, use raster images at 100 ppi at full print size, outline or provide fonts, link included assets, and follow the product template for bleed. Native Illustrator, Photoshop, and InDesign files are preferred; editable PDF, JPG, TIF, PNG, and EPS are also accepted. Source: https://shop.skyline.com/pages/artwork-submission