When it comes to promotional products, a paper proof typically refers to a physical or digital representation of the product's design and imprint that is provided for review before the final production run. This proof allows you to see how the promotional product will look and ensure that it meets your expectations before it goes into production.

Virtual proofs are a valuable tool as they help customers make informed decisions, avoid surprises or mistakes in the final product, and streamline the production process by minimizing errors and rework. They are particularly useful when working with customized or personalized promotional items, as they allow for visualizing the end result and making necessary adjustments before production begins.