In order to add or edit a quick or full blog post, you must first be logged into your website's Dashboard.
When you create a new blog post, you can select either a Full Post or a Quick Post from the Entry Type dropdown.
A Full Post is a full blog post that opens in its own page, and has all the Blog Entry Builder elements for you to add and arrange as you like. You can add different elements by clicking the buttons, and you can arrange them by dragging and dropping.
A Quick Post is just a short post, with a title and a text area that is limited to 500 characters. There is no Builder, and no other elements can be added to the post. It does not open to its own page, but sits in it's place in the blog feed.