What is the difference between an activity 'asking for ideas' and a conversation?

Challenges and conversations - what's the difference?

An activity 'asking for ideas' (a challenge) lets you ask your community to share their ideas about how to respond to a particular social issue or community challenge. Your community can rate ideas with emoticons and endorse ideas they support.

A conversation is a simpler way of opening up a topic or question to the public for discussion. This activity suits general comments and simple discussions between members.