Better SEO title tag for Blogger/ Blogspot

Open Blogger Template

1. Open Blogger’s Dashboard.
2. Go to the Layout tab.
3. Go to Edit HTML.
   1. Download the full template, for backup purpose.
   2. Check Expand Widget Templates.

Edit Tag Title code

Find <title><data:blog.pageTitle/></title> and replace it with one of the two above (I prefer the second).

Post title followed by Blog name

If your blog name includes relevant keywords to all your posts, you should use this code:
<b:if cond='data:blog.pageType == "item"'>
<title><data:blog.pageName/> - <data:blog.title/></title>
<b:else/>
<title><data:blog.pageTitle/></title>
</b:if>

Shortening Blog name (only in posts title)

If your blog name is too long, you can manually redefine it, substituting - <data:blog.title/> with a text that includes only the keywords you need.

Post title alone

If you want to strengthen your single post title’s keyword density, use the following code, instead:
<b:if cond='data:blog.pageType == "item"'>
<title><data:blog.pageName/></title>
<b:else/>
<title><data:blog.pageTitle/></title>
</b:if>
I’ve already told you that I prefer this solution: W3C says that the title tag should describe the content of the whole document; and, usually, a post doesn’t talk about your blog.