I suggest not to go for this trick as if you want to add keywords to each and every post there should be “if condition” added for each and every post for example if you have 20 post in your blog then you have to add 20 if conditions. Which increase the weight on the page, like loading page and so?

However I recommend adding new keyword regarding your new post to your existing Meta tag. But if you still want to have this trick it is here.

Before going for this trick Save your template.
To save your template
Go to the Layout tab, and click Edit HTML.
Download your template as an XML-file and save it onto your harddisk. If anything goes wrong, upload it again and not much harm will be done.


Step by Step to add Different Meta tags description For Each Post in your blogspot blog.

Step 1. Find code below

<meta content='Your home page description' name='description'/>
<meta content='your keywords, keywords1, keyword2' name='keywords'/>

Step 2. Add red code to it. This should be your final code.

<b:if cond='data:blog.url == data:blog.homepageUrl'>
<meta content='Your home page description' name='description'/>
<meta content='your keywords, keywords1, keyword2' name='keywords'/>
</b:if>

Step 3.Now add below code just bottom of above code. This code is for the Meta tags for individual posts.

<b:if cond='data:blog.pageType == "item"'>
<meta expr:content='data:blog.pageTitle' name='Description'/>
<meta expr:content='data:blog.pageName + ", your keywords, keywords1, keyword2 "' name='keywords'/>
</b:if>

Step 4. Don't forget to change description and keyword to your own. save it and done.

Don’t forget to change 'Your home page description' with your Site description,
'your keywords, keywords1, keyword2' with your site keywords and finally
In the below code change keyword to your page keywords
'data:blog.pageName + ", your keywords, keywords1, keyword2"'

Happy Try if you find any difficulty please post a comment i will help you out.