Phase is the period during the life of a cell between the end of mitosis and the synthesis of more genetic material. g0 phase g1 phase g2 phase s phase

S PHASE

Cell division involves the different phases such as G1, G2, M and S phase. Cell division is the mechanism of cells to divide into other cells. Two types of cell division is popularly called the mitosis and meiosis. There basic difference is how they function and how many chromosomes their daughter cells have. 
Mitosis is the cell division that happens anywhere in the body for most cells. However, the meiosis happens in the production of gametes are the reason why there are only 23 chromosomes in the sperm and egg cell.