So lets see how to add Meta content in blogger :
First of all , What are Meta Tags?
Meta tags are HTML tags that provide more additional information about your blog that is invisible , in short cannot be seen by visitors but available to all search engines google , yahoo , bing , altavista etc. The meta description tags/keywords provides a short summary of the page content. The keyword meta tags show the keywords and keyword phrases a visitor might use to find your blog.
search engines have become smarter and most no longer place emphasis on keywords to establish page ranking however keyword meta tags are still used by some search engines so it is a good idea to include them.Meta tags and meta descriptions has be inserted into your Blogger Blogspot blog template and is very easy process and it does not even slow down your blog . It will work a long way for improving the placement of your blog in search engine results.
Simply placing a meta tag description in your Blogger template is problematic because Blogger will use the same meta tags for all pages in your blog. This means that every entry that Google has for your site will show in search results with the same description. This solution would result in reduced traffic rather than increased traffic. However there is a way to addmeta tags to the home page of your blog only which will not affect post pages in your blog. In this way visitors will find the home page of your blog in search engines by the use of appropriate keywords and a site description and by submitting sitemaps feed .
How to Add Meta Tags to a Blogger Blogspot Blog Home Page
Login to Blogger
Navigate to Layout > Edit HTML
Back up your template as a precaution by downloading full template.
Check the Expand Widget Templates box
Find these lines which will be near the top of your template:
<head>Paste the following code right below <title><data:blog.pageTitle/></title>
<b:include data='blog' name='all-head-content'/>
<b:if cond='data:blog.url == data:blog.homepageUrl'>Enter your blog description between the single quote marks under description.
<meta content='Place your blog description here' name='description'/>
<meta content='Place your blog keywords here(separated by commas)'
Maximum 150 characters
Enter the keywords of your blog between the single quote marks under keywords. Ensure you separate each keyword or keyword phrase by a comma. Make sure your keywords do not exceed 200 characters
By way of example
Click on the Save Template button . To see your description in action you can either navigate to your blog's home page and click on view source in your browser or enter your blog url in gogle search and you will see same description as you have edited on Meta field .
How to Add Meta Tags to a Blogger Blogspot Blog Individual Post :
Even if you search for specific post title in google , you will still see same meta content even for that post link , so its better to add Meta for every post , but that may create havoc as there should not be so much Meta content . Best idea is to add Meta only to the most important or you can say killer posts in which you get the must traffic .
Follow similar manner as for adding meta tags to the Home Page just
Add the following in the <head> section of your Blogger template. Enter this code below the Home Page code above you have just entered:
<b:if cond='data:blog.url == "http://url of your post"'>
<meta content='keywords pertaining to your post' name='keywords'/>
<meta content='crafted description of your post' name='description'/>
Here is an example of optimized meta tags for this post:
<b:if cond='data:blog.url == "http://templates-widgets.blogspot.com/2010/02/best-tricks-add-meta-tags-to-blogger.html"'>Note:
<meta content='' name='add meta tags to blogger,meta tags to blogger'/> <meta content='' name='description'/>
Search engines no longer place too much emphasis on keywords but on title posts some still do so it is worth adding keywords. Avoid using the same or similar keyword as search engine may stop indexing site if considered as spam .The maximum number of keywords recommended is around 20 that matched blog content perfectly .
Ensure Maximum characters for Title Tag - 60 , Site Description - 150 , Keywords - 200