r/Bullriding

Here is a video from my last rodeo. As you can see right as the bull turns I fell off, this is something I struggle so much with and everyone keeps saying stay square or something like that’s and I don’t really know what that means.

I’m still new to bull riding(been on maybe 30-40 bulls)

From this short video what do I do to be able to start covering bulls that actually turn back and spin?