{
  _id: ObjectId(“507f191e810c19729de860ea”),
  name: “C++”,
  ranking: 1   // Amount of profiles that has C++ skill on his profile
},
{
  _id: ObjectId(“507c7f79bcf86cd7994f6c0e”),
  name: “Java”,
  ranking: 1   // Amount of profiles that has Java skill on his profile
}