Every human being was created to worship God. Many people worship something other than God, however, every human being will worship something or someone whether they acknowledge it or even realize it. Most of the time I believe most people are worshiping themselves. Even those who claim Jesus Christ as their savior do not worship Him all the time.
What is worship? Worship is not just singing some Hymns or praise songs. I believe this is more presenting praise (part of worship) to God rather than worship. Worship is a way of life. Worship encompasses every ounce of our being, every decision we make. Webster defines worship as: reverence offered a divine being or supernatural power; also : an act of expressing such reverence.
Why dos worship matter? Worship matters because it defines every human being who has, does and ever will exist. That is why as followers of Jesus Christ we are supposed to be defined by Him. If we worship a human being (especially including self) we are worshiping a sinful wicked being and will tend to adhere more to wicked practices. If we, on the other hand, worship Jesus Christ then we worship a perfect being and will tend to follow His practices. However, sin is not of God, so when we sin we are not worshiping God.
