Add more details for block page

Author: maxvp

src/content/docs/cloudflare-one/policies/gateway/block-page.mdx

@@ -39,7 +39,7 @@ To turn on the block page and specify a custom block message:
 
 ## Redirect to a block page
 
-You can set Gateway to perform a 307 HTTP redirect to a custom URL in lieu of a block page.
+Instead of displaying the Cloudflare block page, you can configure Gateway to return a `307` (Temporary Redirect) HTTP response code and redirect to a custom URL.
 
 To redirect users to a non-Cloudflare block page:
 
@@ -48,7 +48,7 @@ To redirect users to a non-Cloudflare block page:
 3. Choose **URL redirect**
 4. Select **Save**.
 
-Gateway will now redirect users to a custom page when visiting a blocked website.
+Gateway will now redirect users to a custom page when user traffic matches a Block policy with the block page configured.
 
 ## Customize the block page