How To Add Meta Tags For Each Post In Blog?

Inability to add Meta Tags (Meta Description , Meta Keyword) to each post of Blogger blog is always remains the dark part for the SEO of blogs hosted on blogger. Meta keyword is not so important for search engines now a days but meta description is very much important. In Blogger one can only add the Meta Tags for home page of blog , if you have not added then Add Meta Tags to Blogger Blog .