Search Description is recently introduced in Blogger. Before, there was no option in blogger for putting Search Description for Blogger or Blogger Post, but now blogger has introduced it. Search Description for Posts can play a very important role as far as Search Engine Optimization (SEO) is concerned. Search description for post enables better indexing of pages on a search engine like Google and other search engines. You should put up to 150 characters description for blogger post better SEO result.
Follow the things given below to enable search engine description.
Sign into your blogger account and click on the name of the blog for which you want to Enable Search Engine Description.
After you click on it on the left-hand side you will be able to see many options like a new post, overview, post, pages, comments, google +, stats, earnings, layout, template and settings like shown in the screenshot below.
Click on Settings.After you click on settings you will be able to see Search Preferences on the left side below settings. Click on search preferences. Now on the right side on top first below meta tags Description in given click on edit and you will be able to see a screen like shown in the picture below.
Click on enable and write a description of your blog and click on save changes.
Now every time when you write a new post you will be able to see Search Description on the right side like shown in the picture below. Where you have to type your post description of up to 150 characters for better indexing.