Google Panda algorithm started in February, 2011. Just updated Google Panda. The main reason of Google panda update was just to keep low content sites. So, Broken link and duplicate content is harmful for website or blog.
Duplicate content will be born your smart targeted traffic and ranking. Google like distinctive content. If Google realize any duplicate content or caliber content on your web site or blog site are going to be started from their search results. So, check your content use seo tools with Duplicate Content Checker and take away duplicate content on your diary or web site. This tools is unengaged to use.
No Content Checker Tools Google Page Rank Submit Type
1 http://www.duplichecker.com 5 Free Submit
2 http://www.virante.org 4 Free Submit
3 http://www.copygator.com 4 Free Submit
4 http://www.plagium.com 6 Free Submit
5 http://www.copyscape.com 7 Free Submit
6 http://www.plagiarisma.net 6 Free Submit