Do you know adding meta tags is so important if you want to get more traffic from search engines like google,yahoo,msn,etc,especially the meta description is the most important one.
If you don't know what meta tags are,Meta tags are the tags which describes your site and tells the search engines what your site is all about.Adding meta tags is an important factor in SEO.(Search Engine Optimisation).Meta tags allows search engines to index your web pages more accurately. In other words,Meta tags communicate with the search engines and tells more information about your site and make it index correctly and accurately.
Here is an example.This is what I got when I typed 'Kranthi tips' in the Google Search Engine.

As you can observe.'Tips and tricks............' is the meta tags description which I added to my site.

2.Click on the 'Edit html' tab

<meta content='DESCRIPTION HERE' name='description'/>
<meta content='KEYWORDS HERE' name='keywords'/>
<meta content='AUTHOR NAME HERE' name='author'/>
DESCRIPTION HERE:Write your blog description
KEYWORDS:Write the keywords of your blog
AUTHOR NAME:Write the author's name(Your name)
{ UPDATE : }
Now..You don't need to do it manually.. I created an automatic Meta Tags Generator to make this process easy for you!
Just go to this page and Enter some basic information like keywords,description,etc.. It will automatically generate you error free, effective Meta tags. Once done, copy that code and follow the next step.
3.Add the above code just after this [Look at the below screenshot]
<b:include data='blog' name='all-head-content'/>

Don't forget to add description and keywords.
and save the changes.