Shopify is certified Level 1 PCI DSS compliant. As a result, all Shopify online stores are automatically PCI compliant, which ensures your customers have peace of mind when shopping from your site and makes sure your business comes across as legitimate and safe.
The Payment Card Industry Data Security Standard (PCI DSS) was adopted by the Payment Card Industry Council in 2005 with the aim of protecting card holder data used during online payments. It is backed by American Express, Discover Financial Services, JCB International, MasterCard Worldwide, and Visa (source).
Merchants are required to conform to a set of standards including:
Website and server vulnerability checks by Approved Scanning Vendors (ASVs)
Company security audits
Self-assessment questionnaires (SAQs)
These are provided by a handful of internet security companies, appointed and recognised by the PCI standard backers.
Being PCI compliant is imperative in today's online commerce. So important that we dedicated a whole post to it.
You can read more about Shopify's PCI compliance and security measures here .