1999 Jeep Grand Cherokee Weird noise

I have a jeep grand Cherokee awd and every time i give it some acceleration when driving it makes a weird clunking noise, it doesn't do it when i just use normal acceleration and it only does it when im stopped and when i start to go, it also does it when i turn left or right but only does it once again when i step on the gas. I was just wondering why this is happening?

Thanks