In Google Analytics, we can see a chart showing all the traffic sources. There will be different kind of sources like Search Engines, Referral, direct and others. what kind of traffics are grouped under 'other'. Thanks
there is one more new thing in analytics that is page analytics, now you are able to analysis your page in analytics, it will really help to increase the clicks and queries...
Other Traffic stats for marketing campagins you'd done for your website using utm tags. & you can see details of other traffic under campaigns. Let me know still if you have any query,
I think that the other is meant for social bookmarking sites,directory sites or from any like article sites.
Google analytics have 2 different traffic source 1,Direct traffic and 2nd referral sites like digg ,twitter and stumbleupon.
In google anaylatic 2 types of traffic - direct & referral. many other sub parts like keywords,browser,search engine etc.