As we will work only on the Blogger platform, here I will leave a little guide to easily add a meta description.
Meta Description in Blogger
The first thing we will do is going to our Blogger dashboard and from there, go to Settings > Search preferences > Meta Tags > Description and click on Edit.
Then check the box "Yes" to enable search description. Finally, click the "Save Changes" button.
Adding Meta Description To individual Posts
Now we will focus on adding the meta description to individual pages. Simply edit the page or post, look for the Search Description setting, and there we enter the text and save by clicking the Done button.
And that's it. However it is best to test if it works and we will do so with the MetaChecker online tool, where we only have to introduce the url of a post or page, click Analyze and then it will show the results, including a complete analysis of keywords, on-page seo , meta tags, URLs, current server status and a rating bar that goes from Horror to Excellent.
If none of the meta descriptions appear (rarely fails), we can do the process manually, but it requires us to touch a bit of code. In this case, go to Template > Edit HTML and insert before <b:skin><![CDATA[ the following code:
<b:if cond='data:blog.metaDescription != ""'>Of course, we will use again the previously mentioned tool to ensure that the description is placed correctly and if all goes well, our blog would be ready to face a good SEO.
<meta expr:content='data:blog.metaDescription' name='description'/>