We know that after publishing a content Google index it and crawl in search engine. But sometime your blog content become duplicate without any noticeable reason. Suppose you have post a content and same post in blog archive creating 2 same content which may penalize by Google. Though you are creating genuine content but due to another copy in blog archive your post become duplicate. In this case Google apply some penalty for blogs such as, downgrade the page rank or banned by search engine.
So we can prevent this problem by applying a simple piece of code. For this reason you have to set a code that Google Search Engine won’t index your achieve pages.
Step 1 Log in to your blogger account and Click on Template ->
Step 2 Click on Edit HTML
Step 3 Now find <Head> by Pressing Ctrl + F
Step 4 And Paste the below code after/below <Head> and save your template
<b:if cond='data:blog.pageType == "archive"'>
<meta content='noindex,noarchive' name='robots'/>
Now the archive pages will not index by search engines. Avoiding duplicate content in the search results.