An offering to the Lord; one tenth of one’s surplus after all responsibilities and needs have been taken care of. The primary purpose of collecting the tithes and the yield upon it is to bless and benefit the lives of those in need. “Assist the poor directly, looking for God’s guidance in so doing. Have no poor among us. Help provide for those who need housing, food, clothing, healthcare, education, and transportation. Take the money the Lord intended for the poor, and administer it for the poor.”
Glossary: Tithing

And these signs shall follow them that believe: in my name they shall do many wonderful works (T&C 82:22). You want a sign that someone is a follower of Christ? Go ask the single mother with children who’s being helped by the tithes of a fellowship that go directly to help her whether that is a wonderful work in her life and in her experience, and that’s the first sign—perhaps the primary sign; perhaps the greatest sign. Because it’s relieving the need of someone that needs it.
Source: Signs Follow Faith

One of the ways in which we develop in community is by sharing in fellowships, contributing tithing in order to relieve people’s basic needs (shelter, food, education, medical care, transportation) and, when you are a person in need, receiving that. And in that dynamic, the giver needs to do it cheerfully (and that requires some amount of learning), and the receiver needs to do so cheerfully. And no one should think of themselves as “better than” and no one should think of themselves as “less than”—because we tend to develop unhealthy attitudes.
Source: Be of Good Cheer

If you meet in homes as the early Christians did, and if you gather your tithing – one tenth of your surplus after you have taken care of all your responsibilities, all your needs, whatever’s left over – one tenth of that is your tithe. After you gather your tithe then you ought to look at your brothers and your sisters who are there in your meeting, and you ought to help those who have needs, who have health needs, who have education needs, who have transportation needs, who have food needs, who have children that need care. Christians should take care of the poor among them, and no one should be looking at the flock and saying, I need your money to support myself . Christian charities should be used to take care of the poor among you and not to engage in acquiring the cares of this world. This is why all Christian churches have become corrupt. They love money and acquiring financial security and church buildings more than caring for the poor and the needy, the sick and the afflicted.
Source: Authentic Christianity