I'm reading a book on Java EE 6 and I met with the following parts:

"Stateless: The session bean contains no conversational state between methods, and any instance can be used for any client."

"Stateful: The session bean contains conversational state, which must be retained across methods for a single user."

What does "conversational state" mean ? Has somebody real world example to explain it ?

Thanks in advance.

II. Why this classification of beans so important ? It tells nothing with correct explanation either or for beginner (at first sight ) So thanks to you I got the logical difference, but why this kind behaviour so important ?

jakarta-ee ejb-3.0 java-ee-6
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