For all you apple tech geniuses?

I ran out of storage on my phone. I only had 5GB, and 4GB of it is my current iPhone backup. If i delete that, will it affect my phone in anyway, or will i still have everything.
i have automatic back up on, so if i did end up deleting that back up to free storage, will it continue to back up my phone from that point on?

IPhones have 256gb

No it will not backup any more

If you delete the backup it wouldn't mess up anything on the phone of course, but if anything was to happen then you'd be screwed & as you have automatic backup on it is going to just regenerate anyway. I assume you are referring to the iCloud storage there not the actual phone's storage.

If you need to free up storage for it, if you have things like pics, vids, you should transfer them to other photo/video storage sites like Google Photos.