This is now the main reason for everybody. All the duplicate problem cause becuase of using <link expr:href='data:blog.url' rel='canonical'/> tag manually. Most of the template are using this tag manually with other tags. This tag causes all the duplicate problem like ?m=0, ?m=1, show comment page link and other duplicate problem. You can easily solve this problem without editing robots.txt file. Remove the <link expr:href='data:blog.url' rel='canonical'/> tag. Now after <head> code paste <b:include data='blog' name='all-head-content'/> code and save. This code automaticly generate all the necessary tag for your blog including the canonical tag also. Now visit your blog using ?m=0 or ?m=1 and see it will show the main canonical url. After using it all your duplicate problem will be gone. Also check my previous tutorial
<link expr:href='data:blog.url' rel='canonical'/>
<b:include data='blog' name='all-head-content'/>
Make blogger label ulr or permalink like wordpress - http://ask.mybloggertricks.com/t/make-blogger-label-url-or-permalink-like-wordpress/6643
Thank you @tunerrazu for helping the community with your useful tips. Well done!
Thank you very much brother for your reply
Thanks for this trick i have applied it to my blof
Thank you brother I hope I can solve this problem I follow your instruction. Thank
Hi Sir I applied this in my blog but still there are duplicate content. My blog is combinebasic.com
@greencomval now wait soon your duplicate content will be vanished after google recrawl again.
Ok thank you, I appreciate your help If this will not gone I will ask you again and I will put here the meta tags that cause the problem.