An ohel is a special shelter or covering that is put up over a grave to show respect and protect the area. Think of it like a big tent or canopy that is made to keep rain, sun or wind from bothering the grave site. People often place ohels over the graves of important religious figures or loved ones as a way to honor them and create a special space for remembrance. People can go inside the ohel to pray or pay their respects, almost like a little house for the grave. It's a way to keep the area sacred and protected.