Custom Header Tags is similar to robot.txt which is important for SEO. By this setting, you will guide the search engine crawler/robot what page should crawl or what should not. With this tutorial, you must Add Custom Robots.txt File in Blogger.
How to Setup Custom Header Tags in Blogger
1. Log in to your blogger account and select blog which you want to edit.
2. Go to "Settings" at the left side of your blog dashboard and, click on "Search Preferences".
3. Now, look for "Custom robots header tags" under Crawlers and Indexing. It is disabled. You have to Enable it. To change it, click on "Edit" and, select "Yes". You will see more options with checkboxes. Follow the settings which are given in following pictures.
4. At last, click on "Save changes".
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