Induced pluripotent stem cells, or iPS cells, are extracted from somatic cells. These cells are then reprogrammed into an embryonic-like pluripotent state as a strategy to open endless possibilities in terms of what cell one wants to create. This procedure is helpful when it comes to aiding humans in therapeutic settings, such as help with various neurological disorders.
A particular pluripotent stem cell is basically identical to embryonic stem cells. It can be generated from a mature cell with specific genes through a process called cellular differentiation.
The difference between pluripotent stem cells and embryonic stem cells is that the former cannot give rise to the placenta, whereas the former can.