(adsbygoogle = window.adsbygoogle || []).push({}); Like if you get level 30 on ps3, is the same account level 30 on ps4? Like is it linked?

yes as long as you have an account set up on callofduty.com and when your on the ps3 you have to go start up ghosts multiplayer click barracks, then click the last option at the bottom that says account then your good to go