Probably a site, could be a lot of things. Let me give a general definition from my file for red. I didn't check for shallow targets yet, that will be another search.
Red line box (or solid filled circles) for very deep coins/treasure or artifacts of value.
K got to go out today using the rods. I hit one site with rods and got a hit. I dug but because of rain I ( about 1 foot) couldnt stay . It is going to be freezing rain for the next couple days. It is too muddy to locate without a very good detector and a pointer,that will be my next investment.Ill try again next week. Thank you Red. If i find anything ill pm you.