Banner Ads Fill Entire Screen,Banner ad fills entire screen

I’m new to unity ads, so please excuse my incompetence.

When using a banner ad, i get the standard ‘your ad unit is working’ message, but it unfortunately fills up the entire screen. When I launch to testflight or the appstore, will it continue to fill the entire screen, or will it only appear in a rectangle at the bottom of the screen?

Thanks! (this is my first forum post),New to using ads in unity, but when my banner ad appears I get the standard ad unit screen, however it takes up the entire screen. When launched to testflight or to the appstore will this only appear as a small rectangle at the bottom of the screen, or will it still take up the entire screen?

Thanks!

I am using the Facebook audience network in Unity for advertisement. I am currently facing an issue while showing facebook banner ads in unity. Just when I call banner ad show call. Exception triggers:

java.lang.illegalargumentexception: adsize at com.facebook.ads.redexgen.x.8h.(:18251)

Anybody knows how can I resolve this issue? Thanks in advance