What is Jaggies??

I have been rejected by a photo by Jaggies, I try to look for a translation and I do not know that it is someone can explain it to me.

Thank you

Jaggies are oversharpened places. Flaps, windows, doors etc. these are the most common places where they appear.

Thank you very much for the clarification VicenceM

Jaggies will appear as jagged or zig zag lines when too much sharpening is applied. If you do your sharpening on a separate layer you can use the eraser tool at the appropriate opacity to get rid of any jagged edges while leaving the rest of the photo untouched.