I have some common points in some webpages as features. Is it harmful to SEO? Will google penalize it as duplicate content in Google Panda? I want to put these features in all pages without effecting SEO and duplicate content issue. Anybody knows how to fix this problem, please suggest me some methods to overcome this issue.. For this what should be done. Please help.
canonical would be the best solution for that one, learn more about it here: http://www.google.com/support/webmasters/bin/answer.py?answer=139394
If you have 2-3 common lines then it would not be considered as duplicate content but if pages have same paragraphs then it would create duplicate content issue so in this situation use canonical tag.
If you have a duplicate content on your site then Google Panda has been penalize your site. So be careful about the content.