The blog page provides customers with a landing page or index for your blog posts.
Access blog page settings through the theme editor
Every time you publish a new post to your store's blog, Shopify will generate a new page and URL for it. To access the settings for these pages, navigate to the blog in the theme editor and then click Blog page under the Sections tab.
Posts per page
Customize the number of posts that display per page using the Posts per page slider (4-24).
Show RSS link
This setting provides customers with the option to "subscribe" to a stripped-down version of your content in an RSS reader.
Include a compilation of all the tags used in the blog.
Show post author
Displays the name of the staff member who composed and published the article.
Show post excerpt
Rather than displaying the whole post, enable this option to include an excerpt. Access Shopify’s excerpt function in the post editor (Online store > Blog posts > Blog post > Add excerpt).