Hello,
If you’re not using a Theme Blvd theme, then it’s essentially just registering a custom post type and associated taxonomies. So, as a stand alone plugin, if you’re not doing the development, it’s not going to do much for you.
If you are using a Theme Blvd theme, then it’s just utilizing the theme’s current post grid design you’re already familiar with. The exception is that now the posts displayed are from the plugin’s custom post type, opposed to just standard posts.
Some examples:
https://demoblvd.com/themes/jumpstart/page-templates/post-grid-3-columns/
https://demoblvd.com/themes/alyeska/page-templates/post-grid-3-columns/
https://demoblvd.com/themes/akita/page-templates/post-grid-3-columns/
https://demoblvd.com/themes/swagger/page-templates/post-grid-3-columns/
