OpenRTB 2.5 includes updates that integrate current trends and allows for improvements in programmatic technology. Release highlights include:

IAB New Ad Portfolio Support – integrating flexible aspect-ratio based ads into the bid object.

Video Placement Type Support – adding visibility into what type of placement a VAST (video ad serving template) tag is running in accordance to the IAB digital video glossary.

Header Bidding Support – allowing for a signal when a bid request is originated from an upstream decisioning implementation like header bidding.

Historic Metrics Support – whereby exchanges can pass historic metrics such as viewability or click through rate.