Post Format: Gallery – A gallery of images. Post will likely contain a gallery shortcode and will have image attachments. Install Jetpack to use galleries.
Post Format: Image – A single image. The first <img /> tag in the post could be considered the image.
Post Format: Quote – A quotation. Probably will contain a blockquote holding the quote content. Post Formats
Post Format: Video – A single video. The first <video /> tag or object/embed in the post content could be considered the video. Learn more about WordPress Embeds.
Post Format: Audio – An audio file. Learn more about WordPress Embeds.
Post Format: Status – A short status update, similar to a Twitter status update.
Post Format: Aside – Typically styled without a title. Similar to a Facebook note update.