"One important way that God shows His love for us is by calling prophets, who are given the priesthood—the power and authority given to man to act in God’s name for the salvation of His children. Prophets learn the gospel of Jesus Christ by revelation. They in turn teach the gospel to others and testify of Jesus Christ as the Savior and Redeemer. The teachings of prophets are found in sacred books called scriptures."
On Mormon.org you would find the following:
"Mormons are members of The Church of Jesus Christ of Latter-day Saints and are committed to honor and follow God’s will, which comes through His Prophet and Apostles. This means we prayerfully listen to their words, support them, and pray for their well-being."
In the New Testament in the book of Matthew chapter 7 it says:
15 Beware of false prophets, which come to you in sheep’s clothing, but inwardly they are ravening wolves.
What this scripture tells us is that there are many that may come to us claiming to be prophets. The way that we can tell if they truly are called of God is to look for their "fruits". By the way they talk, act, and advise, we can come to know if they are prophets. I would like to invite everyone to watch General Conference. As you hear the prophet of the world, Thomas S. Monson speak, you can come to know that he is a prophet of God. I know that he is. By his fruits shall ye know him! I can testify of that!