Advertisers can now post in vertical format on Instagram
Instagram has given marketers "greater creative flexibility" by launching vertical photo and video ads, according to an Instagram for Business blog post. The message was accompanied by examples from brands Mulberry, Guaraná Antartica and LG USA, and told marketers it wished to "encourage you to experiment".
The Facebook-owned photo- and video-sharing network announced in an Instagram for Business blog post Friday that brands can now create photo and video ads in the vertical format, with up to a four-to-five aspect ratio.

Instagram provided examples by Mulberry, Guaraná Antartica and LG USA, and it added in the blog post: