Hi Gizmozz, If you're talking about Blogger.com then they are more than happy for you to make changes to the html source. Or at least last time I looked. They only thin gthey say is that it is at your own risk. In other words, take a copy of the html first before you edit in case you make mistakes and then can't fix it back to the way it was. Cheers, Sam
If you are talking about a blog hosted on your own domain the I generally would recommend using specific meta info for each post. If you are using WordPress there are plug-ins that will help you do so.
Install All In One SEO Pack plugin for your blog and write meta titile, description and keywords for each blog post.
atniz - No SEO pack is available for Blogger. All in one seo pack is available only for Wordpress. gizmozz - we can add title, meta only once for blog. We can't able to add them individually for each post. Bcoz, we add title, meta data in the blog template. If you want to add them, manually you have to add. And for each blog post it is impossible, bcoz its a common template for all the blogposts with in a blog. You can add individual title, meta data for different blogs created within your profile. All the best.