Prevent received mails in my gmail from getting randomly marked as important automatically

Question

Recently I am encountering this problem while using new Gmail, the problem is that it randomly marks my randomly mails as important, the one's I recently received from other email id's. Not all mail are marked important, say for example I received 3 emails, it'll mark 2 emails as important and it won't mark the 3rd one as important I mean it picks any random new received email and marks it important, is there any logic behind this? Any idea why this happens and how can I stop it?

Answer 1

The official priority inbox video explain very clearly how it works.

Basically you need to teach to your gmail how to recognise an important email to obtain a descent result.

http://www.youtube.com/watch?v=5nt3gE9dGHQ&sns=em

Answer 2

To turn off importance markers:

1. click on the gear symbol
2. Select settings
3. click on Inbox
4. select the Importance Markers: No Markers radio button
5. Click the Save button

It never worked well for me.