Update tlog entry info

Signed-off-by: Appu Goundan <[email protected]>

content/en/about/bundle.md

@@ -51,8 +51,10 @@ the format of the hint must be agreed upon out of band by the signer and the ver
 
 #### Transparency Log Entries
 
-One or more transparency logs entries to provide proof of inclusion in a public log and optionally a timestamp to
-validate signing occurred during ceritificate validity.
+Transparency Log entries are valuable metadata for ensuring supply chain integrity. They are not required by the spec
+but are highly encouraged for bundles subject to public consumption. One or more transparency logs entries in the
+bundle can provide proof of inclusion in a public log. An embedded signed entry timestamp may be used by clients
+to validate signing occurred during ceritificate validity.
 
 ```json
 "verificationMaterial": {