Single sign-on (SSO) enables users to provide their credentials once and obtain access to multiple applications. The users are not prompted for their credentials when accessing each application until their session is terminated. Additionally, the user can access all these applications without having to log into each one of them individually. So, if users log into application A, for example, they would automatically have access to application B as well for the duration of that session without having to re-enter their credentials. In WSO2 API Manager, you can enable SSO by using either SAML2 or OAuth2 OpenID Connect (OIDC).
The following sections explain more details on how you can use SSO in WSO2 API Manager.