Growth and Dividend are essentially options of how investors want cash-flows. During the course of a year, a mutual fund scheme may make profits through dividends from shares ownership or interests from bonds owned by the scheme and also through portfolio churn (profit booking by buying and selling shares and bonds). In a growth option the profit is re-invested to generate more returns whereas in dividend option (Known as IDCW - Income distribution cum withdrawal) the profits are distributed to the investors on a regular basis (annual, semi-annual, quarterly, monthly etc.). Dividends are declared on a per unit basis. Capital appreciation is much higher in growth option because investors benefit from compounding over a long investment horizon; NAV in growth options grows much more than dividend option where the NAVs get re-adjusted whenever the scheme declares dividends. However, some investors may need income during the tenure of the investment and dividend option is suitable for such investors.
Dividend re-investment is another option available to investors. In this option for the dividends instead of being distributed to investors, get re-invested to buy units of the scheme. A dividend re-investment option works very much like a growth option. The major difference between growth and dividend re-investment option is that, in growth option investor gets capital appreciation through growth in NAV, whereas in dividend re-investment option the investor gets capital appreciation through incremental units (the NAVs of dividend and dividend re-investment options are the same). Tax consequences of growth and dividend re-investment option are different.