Nov 15

What is the difference between VAST, VMAP and VPAID?
VAST & VMAP:
http://support.jwplayer.com/customer/portal/articles/1432026-vmap-ad-schedule

VPAID:
https://support.google.com/dfp_premium/answer/1663924?hl=en

？？？
VAST: 一个广告
VMAP: 一堆广告
VPAID: 一堆会动的广告

What is frequency capping?
https://en.wikipedia.org/wiki/Frequency_capping