minor edit to add faq to pr

Author: barclayn

articles/active-directory/verifiable-credentials/verifiable-credentials-faq.md

@@ -28,7 +28,7 @@ This page contains commonly asked questions about Verifiable Credentials and Dec
 
 ### What is a DID? 
 
-Decentralized Identifers(DIDs) are identifiers that can be used to secure access to resources, sign and verify credentials, and facilitate application data exchange. Unlike traditional usernames and email addresses, DIDs are owned and controlled by the entity itself (be it a person, device, or company). DIDs exist independently of any external organization or trusted intermediary. [The W3C Decentralized Identifier spec](https://www.w3.org/TR/did-core/) explains this in further detail.
+Decentralized Identifers(DIDs) are unique identifiers that can be used to secure access to resources, sign and verify credentials, and facilitate application data exchange. Unlike traditional usernames and email addresses, DIDs are owned and controlled by the entity itself (be it a person, device, or company). DIDs exist independently of any external organization or trusted intermediary. [The W3C Decentralized Identifier spec](https://www.w3.org/TR/did-core/) explains this in further detail.
 
 ### Why do we need a DID?