How To Add Dynamic Meta Description Tag

1. Log in to your blogger account >>Design >> Edit HTML

2.Find this tag by using Ctrl+F
                                     <b:include data='blog' name='all-head-content'/>

3.Past e below code after the above tag

                     <META NAME='description' expr:content='data:blog.pageTitle 

                    + &quot;,PUT IN YOUR COMMON BLOG DESCRIPTION 

                                               TAGS HERE &quot;'/> 

4. Replace PUT IN YOUR COMMON BLOG DESCRIPTION TAGS HERE
  with your description

5. After click Preview and click Save template.