Duplicate Meta Description and Titles Issues In BloggerDuplicate Meta Description and Titles Issues In Blogger

Now the reasons that your blog has these errors:
1. In Blogger, although you can add meta tags to the template easily, but these tags are then used for the entire blog  (all the posts). So the description tag, which is only meant for the main/home page gets copied and is displayed for all the pages. Now Google assumes that all your pages are having the same content, which is a serious offense in Search Engine Language !

2. The second issue of duplicate titles arises because Google indexes blog posts and comments separately, and while indexing comments, it again indexes the complete posts. Now this is where a serious problem of duplication of both content and titles takes place.

So you must remove these errors to make a successful and Search Engine Optimized blog.

Finally the solution to the problems:

1. First of all, in the template (Blogger-> dashboard -> Layout -> Edit HTML) find (CTRL+F) the code for meta description tag, something like this:

(DELET THIS *  BEFORE USING THESE CODES)

<* meta content="GENERAL_DESCRIPTION_HERE" name="description"/>

Now put that tag in an "if" condition, so that it will be displayed ONLY in the HOME PAGE:

<* b:if cond='data:blog.url == data:blog.homepageUrl'>
<* meta content="GENERAL_DESCRIPTION_HERE" name="description"/>

Replace the text in RED, with your blog's description. Now save the template.

2. For the second issue (duplicate titles); in the same page (Layout -> Edit HTML), click on "Expand Widget Templates".
Then find (CTRL+F) this code:

<* a expr:href='data:comment.url' title='comment permalink'>
<* data:comment.timestamp/>

Replace the entire code with this new code:

<* b:if cond='data:post.commentPagingRequired'>
<* a expr:href='data:comment.url' title='comment permalink'> <* data.comment.timestamp/>

<* a expr:href='data:blog.url + "#" + data:comment.anchorName' title='comment permalink'> <* data:comment.timestamp/>

That's it. Now within a week or 2 weeks, you may see the difference and improvement brought to your blog by this method !
NOTE: For my own blog it took around 10-15 days to get these errors removed from Google.

To see the changes, you should have an account in Google's Webmaster Tools. Once you log in to your account you can see the errors at Diagnostics -> Content Analysis.