This post explains you to how to add meta tags to blogger. This is Very simple. Just follow the below steps.
Step 1: Login to your Blogger account.
Step 2: Click on ‘Layout’ and select ‘Edit HTML’ tab.
Step 3: Search for the following code. It would be at the very beginning of the template:
DESCRIPTION HERE:Write your blog's description
KEYWORDS:Write the keywords of your blog. Be careful in this issue.
AUTHOR NAME:Write the author's name(The Name With which You Publish)
After You add the above code it should look like in the below image
Step 4: Save the Template.
That's It Hurrah! You have Done it.