fix intros to code examples

docs/references/expo/use-sso.mdx

@@ -66,12 +66,16 @@ It accepts the following parameters (`StartSSOFlowParams`):
   The [identifier](/docs/authentication/configuration/sign-up-sign-in-options#identifier) of the user. Required for `enterprise_sso` strategy.
 </Properties>
 
-## How to use `useSSO()`
+## How to use `useSSO()` hook to create a custom SSO sign-in flow
 
 <Tabs items={["With OAuth", "With SAML"]}>
   <Tab>
     The following example demonstrates how to create a custom SSO sign-in flow for [Google accounts](/docs/authentication/social-connections/google).
 
+    The `useSSO()` hook is used to create a new SSO flow with the `oauth_google` strategy. When the user presses the sign-in button, the `startSSOFlow()` method is called. If sign-in is successful, `createdSessionId` is used to set the active session. The `redirectUrl` parameter is used to specify the URL to redirect to after the SSO flow is complete.
+
+    If sign-in isn't successful, the `signIn` or `signUp` method returned from `startSSOFlow()` can be used to further authenticate the user.
+
     ```tsx {{ filename: 'app/(auth)/sign-in.tsx', collapsible: true }}
     import React, { useCallback, useEffect } from 'react'
     import * as WebBrowser from 'expo-web-browser'
@@ -111,7 +115,7 @@ It accepts the following parameters (`StartSSOFlowParams`):
             // If sign in was successful, set the active session
             setActive!({ session: createdSessionId })
           } else {
-            // Use signIn or signUp returned from startOAuthFlow
+            // Use signIn or signUp returned from startSSOFlow
             // for next steps, such as MFA
           }
         } catch (err) {
@@ -133,6 +137,10 @@ It accepts the following parameters (`StartSSOFlowParams`):
   <Tab>
     The following example demonstrates how to create a custom SSO sign-in flow with [SAML](docs/authentication/enterprise-connections/overview#saml).
 
+    The `useSSO()` hook is used to create a new SSO flow with the `enterprise_sso` strategy and the [`identifier`](/docs/authentication/configuration/sign-up-sign-in-options#identifier)  parameter set to the user's email address. When the user presses the sign-in button, the `startSSOFlow()` method is called. If sign-in is successful, `createdSessionId` is used to set the active session. The `redirectUrl` parameter is used to specify the URL to redirect to after the SSO flow is complete.
+
+    If sign-in isn't successful, the `signIn` or `signUp` method returned from `startSSOFlow()` can be used to further authenticate the user.
+
     ```tsx {{ filename: 'app/(auth)/sign-in.tsx', collapsible: true }}
     import React, { useCallback, useEffect } from 'react'
     import * as WebBrowser from 'expo-web-browser'
@@ -158,7 +166,7 @@ It accepts the following parameters (`StartSSOFlowParams`):
     export default function Page() {
       useWarmUpBrowser()
 
-      const { startSSOFlow } = useSSO({ strategy: 'enterprise_sso' })
+      const { startSSOFlow } = useSSO({ strategy: 'enterprise_sso', identifier: 'email' })
 
       const onPress = useCallback(async () => {
         try {