The prostate does many things which includes the production of seminal fluid.
The prostate is a gland which is located in a males reproductive system.
Your prostate produces a fluid which mixes with your sperm from your testicles to form semen.
This fluid also helps to nourish and protect your sperm and makes it easier for the sperm to travel and to fertilize an egg.
A males prostate also regulates ejaculation and contains muscles which contract during ejaculation which force your seminal fluid and sperm out of your urethra.
Your prostate also produces PSA also known as Prostate Specific Antigen which is a protein that plays a role in maintaining the health of your prostate gland.
And having elevated levels of PSA or prostate specific antigens can indicate prostate cancer or other potential prostate problems.
The prostate also supports male fertility by providing a suitable environment for sperm and facilitating the sperms movement.
However the prostate is not essential for life and you can live a long and productive life without a prostate but you won't be fertile and won't be able to get a woman pregnant without a prostate.
The muscles of the prostate also ensure that your semen is pressed into the urethra forcefully and then expelled outwards during ejaculation.