Percentile?

Mariah • 24 P.R.P 04/15/21💖🎀 A.J.P 01/30/24<3

I'm 30 weeks today and my OB said my baby girl is in the 30th percentile. Is that a good thing? This is my first pregnancy so I have no idea what this means. She didn't seem concerned. Bright side is babygirl is weighing 3.2 pounds and is absolutely beautiful😍🥰 also she is measuring 2 days ahead