update email link custom flow guide

docs/authentication/configuration/sign-up-sign-in-options.mdx

@@ -125,7 +125,20 @@ If a country is disabled, then phone numbers starting with the corresponding cou
 
 ### Email link
 
-When the **Email verification link** option is selected as an authentication strategy, users will receive an email message with a link that can be visited in order to complete the authentication process. Email links can be used to sign up new users, sign in existing ones, or allow existing users to verify newly entered email addresses to their profile. Email links work on any device. There's no constraint on where the link will be opened. For example, a user might try to sign in from their desktop browser, but open the link from their mobile phone.
+When the **Email verification link** option is selected as an authentication strategy, users will receive an email message with a link that can be visited in order to complete the authentication process. Email links can be used to sign up new users, sign in existing ones, or allow existing users to verify newly entered email addresses to their profile.
+
+As a security measure, email links expire after 10 minutes to prevent the use of potentially compromised stale links.
+
+#### Require the same device and browser
+
+By default, email links can work on any device. There's no constraint on where the link can be opened. For example, a user could try to sign in from their desktop browser, but open the link from their mobile phone. In this scenario, _the user's sign in would be completed on the desktop browser from which it was initiated, not the mobile phone where it was verified_. As a result, the user would be signed in on their desktop, not their phone.
+
+To configure this setting:
+
+1. Navigate to the [Clerk Dashboard](https://dashboard.clerk.com/last-active?path=user-authentication/email-phone-username).
+1. In the navigation sidebar, select **User & Authentication > Email, Phone, and Username**.
+1. In the **Authentication strategies** section, next to **Email verification link**, select the settings cog icon.
+1. Enable or disable the **Require the same device and browser** setting.
 
 ## Verification methods