can i copy content of other blog?

This is called plagiarism. Look it up - you'll get yourself into a LOT of trouble. I've encountered people stealing content from my blogs in the past. The result (for them) has usually been either removal of the content or, if they refused, removal of their web site by their ISP. It could go to criminal proceedings in extreme cases (though I've never needed to). You can't even produce "snippets" of other blogs and articles without permission. Original content or nothing at all, unless you ask first and credit the original author. It's just lazy anyway. Write your own stuff.

copying contents has following defect: 1. You will suffer for copying and original article writer may go for court. 2. Copying content make ur site not get searched in search engine results. 3. Reputation of website go down 4. Regular user may shift out 5. New user will not enter the site again. 6.Your orginal content too will we act to all as there too had been copied. 7. You reputation on web will down If i miss any give out............