Hello Ozean,
Sorry for the confusion with using/creating the Blog. BoldGrid is a series of plugins for WordPress that make it easier to build a WordPress site. Understanding the creation of a blog using WordPress will probably be the best way for you to understand it. We have a few articles in BoldGrid that talk about it. Check out these links:
The documentation from WordPress for beginners can be found here: https://codex.wordpress.org/Getting_Started_with_WordPress.
WordPress is primarily is a blog application. The built-in functionality allows you to create posts that can include a picture. Preview text is also available to an extent. If you go to the WordPress.org showcase you can see many examples of sites using this format. You can also search through a search engine and then find many free tutorials that talk about how WP works and how to use it for a blog.
I hope that helps to answer your question! If you require further assistance please let us know!
Regards,
Arnel C.