Google's Blogger has added several new "search preferences" settings to the Blogger administration controls.
You can now configure your robots.txt file, meta descriptions, meta tags, set up redirects, customize your error pages, add alt and title attributes to links and even add the nofollow attribute to the links.
The Google Operating System blog uses blogger and they posted a screen shot of one of the search settings page:

Here are help documents on how to use each of these new features:
- Search Description
- Custom robots header tags
- Custom Page Not Found
- Custom Redirects
- Image properties
- rel='nofollow'
For the general blogger and SEO document see this page.
Forum discussion at Google+.

Comments:
Arwin Adriano
03/22/2012 03:25 pm
This was good news to all Blogger Platform users. I think Google is trying to make their move to dominated the CMS world with this improvement.
Sagar Nargolkar
03/22/2012 03:42 pm
Great move by Blogger, was much needed.
Himanshu Dureja
03/23/2012 08:31 am
That's great move by Blogger , i was thinking to shift to Wp , but now i'll stick to Blogger PLATFORM.
Sourabh Rana
03/23/2012 12:16 pm
Yes, so now Google is being more smarter and understanding what SEOs & bloggers need in blogspot blogs.
Seo Services
03/24/2012 04:04 am
Yeah I also thought of same when I finished reading the article.
Basheer
03/24/2012 06:07 am
Now Blogger can compete WordPress and other CMSes with this update. Grate news for Blogger lovers. More control over what we are sharing. But they didn't update the classic label system.
Ahmad Ousaf
03/27/2012 09:50 am
good but how to add
JiMz Freebies
03/27/2012 07:07 pm
thanks. Can you please help me as my blog's traffic decrease 90% within 2days on 22 march, 2012. I don't know the reason(may be due to robot.txt). Can you please tell that how to change/add robot.txt to increase traffic??
gift ideas
03/28/2012 06:31 pm
Yes, so now The search engines is being more more intelligent and knowing what SEOs & blog owners need in blogger weblogs.
bajaj new pulsar
04/22/2012 05:37 am
Thanks for the helping sir! I am not knowing the setting of robot meta for Blogger. I read your article and edit my blog. thanks a lot again..
Samy Jain
04/25/2012 04:23 pm
great share... i just got an error about it ... What would be the best robots.txt for any site according to you?