Update overview.md

docs/overview.md

@@ -4,6 +4,13 @@ sidebar_position: 1
 
 # Overview
 
-## Work in Progress
-
-This page is under construction.
+Identity Access Management for Research Communities (RCIAM) enables researchers
+to securely access and share common resources and services using identities
+from eduGAIN, the global network of academic identity federations. For users
+coming from the industry or citizen scientists who may not have access to
+eduGAIN, RCIAM supports additional trusted authentication providers, such as
+social networks, community identity providers and other platforms such as
+ORCID that can provide federated user identities. RCIAM allows connecting
+services using popular protocols, such as OpenID Connect and SAML, to securely
+authenticate and identify their users, organise them in groups, assign them
+roles and centrally manage access rights for accessing protected resources.