This trick will add Meta Tags only to the Home page of your Blogger blog, not to any other page.

Steps to Add Meta Tags to a Blogger/Blogspot Blog Home Page:

1. Login to Blogger.

2. Navigate to Design > Edit HTML.

3. Backup your Blogger template by clicking Download Full Template and keep it safe in your computer. Remember, its better to do this everytime you do a template edit to be on the safe side in case you encounter any problem.

4. Check the Expand Widget Templates box.

5. Find this code within the blogger template code(using CTRL+F):

<title><data:blog.pageTitle/></title>

6. Paste the following code immediately below the above line.

<b:if cond='data:blog.url == data:blog.homepageUrl'>
<meta content='PUT YOUR BLOG DESCRIPTION HERE' name='description'/>
<meta content='PUT YOUR BLOG KEYWORDS HERE(SEPARATED BY COMMAS)'
name='keywords'/>
<meta content='PUT AUTHOR NAME HERE' name='author'/>
</b:if>

7. Enter your blog description between the single quote marks under description. Around 130- 150 characters should be optimal.

8. Enter the keywords of your blog between the single quote marks under keywords. Ensure you separate each keyword or keyword phrase by a comma. Around 180-200 characters should be optimal.

9. Click on Save Template. You're done.