Blogger is continuously improving SEO features to give better user experience. SEO features are very helpful, it means your articles, poems, stories etc. whatever you write on the blog will be easily crawled by search engine bots. If content in rich, unique and 100% original then your content will be promoted in search result this way you can get more and more blog readers from search engines and ability to earn from your blog.

Now you can see the Custom Robots (Header) Tags option on Blogger dashboard to improve search engine optimization (SEO) for search engines like Google, Bing, Yahoo, Yandex and others.

Blogger custom robots header tags

Manage Custom Robots (Header) Tags for Blogger

1. Blogger Dashboard › Select Blog › Click on Settings › Click on Search Preferences › Custom Robots Header Tags › Click on Edit
2. After clicking on Yes you can easily set the Custom Robots Tags parameters for Home page, Archives and Search pages and Default for Posts and Pages

For more you can take help of following images

Custom Robots Header Tags Management in Blogger
Custom Robots Header Tags Management in Blogger – Screen 1
Custom Robots Header Tags Management in Blogger - Screen 2
Custom Robots Header Tags Management in Blogger – Screen 2
Custom Robots Header Tags Management in Blogger - Screen 3
Custom Robots Header Tags Management in Blogger – Screen 3
Directive Meaning
all There are no restrictions for indexing or serving. Note: this directive is the default value and has no effect if explicitly listed.
noindex Do not show this page in search results and do not show a “Cached” link in search results.
nofollow Do not follow the links on this page
none Equivalent to noindex, nofollow
noarchive Do not show a “Cached” link in search results.
nosnippet Do not show a snippet in the search results for this page
noodp Do not use metadata from the Open Directory project for titles or snippets shown for this page.
notranslate
Do not offer translation of this page in search results.
noimageindex
Do not offer translation of this page in search results.
unavailable_after:
[RFC-850 date/time]
Do not show this page in search results after the specified date/time. The date/time must be specified in the RFC 850 format.

›› For more detailed information regarding custom robots header tags click here.

Conclusion
This article will let you understand the merits of custom robots header tags and make you able to customize these for your blog if you are using Google Blogger for blogging.