URL name: blog
The blog folder should not be renamed or deleted. Within the blog folder you can create documents that will be used on your blog list page.
Blog documents are a type of content document. Aside from text fields a blog document let's you add a variety of components such as banners or a video player. More on the usage of components in content documents can be found here.
Use the checkbox in a blog article to 'highlight' it. The most recently highlighted blog article will be shown as a banner above the list of articles. The most recent blog article will be highlighted when no article has been set as highlighted.
Finally you can enter SEO input for search engine indexing as you would on a landing page or in other types of content documents.
Blog articles can be reached by using a link but are usually presented to website visitors through a landing page component. You can either use the 'Blog list' or the 'Highlighted articles' component for this purpose. More information on these landing page components can be found here. Below is an example of the Blog list component. By clicking the specific articles you can reach the actual blog content pages.