Post / Blog / Recast / Quote Cast
A "Post" is a short content format or 280-character limit. Post can attach a maximum of 4 photos. Post will show link preview if there is no photo attached.
A "Blog" is a long content format without character and photo limit. In the future, the Blogger can design the typography; Header, Bold, Italic, Underline, Link and attach photos for better read experience.
A "Recast" is to share content without a caption to your timeline.
A "Quote cast" is to share content with caption to your timeline. Quote cast is limit to 280-characters and no photo attachment allowed.