How to add Meta Description Tags

1. Go to Settings > Search Settings and Enable Meta Tags. In the Text area give a 150 character description which will describe your Blog. This text might be used by Search engines when your Blog’s home page is displayed on Search Engines. Here is the snippet that I have given “Blogger Widgets provides you the best quality blogger tutorials.It also provides you with free blogger widgets and  gadgets to build a better blog.”
2. Now when you make a Post, you can set the Meta Description from the Post Editor’s Post
3. If you are having a custom template, make sure that the following line of code is present in your template. To do that go to Template and Proceed to Edit HTML . Find
   

   <b:include data='blog' name='all-head-content'/>

   If it's not present, add it just before </head>