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European Digital Credentials for Learning are composed of three different layers: 

1. The summary image: this is the typical visualisation of your credential which will commonly include the minimum information about your credential: your name, the credential title and any other information the credential issuer chose to include.
2. The authentication and verification checks: these checks provide you with information about the validity and reliability of your credential’s technical format and its authenticity. They will also inform you about:
           - Who has sealed the credential (i.e. the legal entity that issued the credential to you)
           - If it has a valid accreditation linked to it (accreditation is an extra form of quality control that can be referenced by institutions in formal learning if they so wish. However, credentials remain valid without accreditation).
           - If anyone tampered with the credential, i.e. edited the file content. In this case, the seal would break and these verification checks would fail, so anyone viewing your credential would realise that the credential’s content can no longer be trusted.
3. The content: the credential structured content is displayed in sections representing the credential holder and issuer information, and data about the achievement(s), learning activity(ies), assessment(s) or entitlement(s) for which you have been awarded a credential.  

On the left-hand side of the EDC Viewer, you will find clickable tabs to access and navigate between these clusters of information. There you can view the whole content of the credential, as in addition to your personal data (at minimum your name), it may include descriptions of the course you completed, your grades, your achieved learning outcomes, or any other information that the issuing organisation documented in your credential. This additional information allows you to showcase the details of your learning to prospective employers or other external parties, who can, in turn, verify your knowledge and skills.