What is the motive for giving offering in church?

I am a Seventh-day Adventist, and I go to church every Saturday. The reasons we give offering sometimes vary (at least in my church). Someone from the church will get up in front and announce what the offering is for. Sometimes it will be for overseas missions, or local church budget (which is basically just giving the church money for their budget), or sometimes the money will go to the local conference that your church is part of.

As for why we give, it's because when we give money to overseas missions, we're paying for missionaries, or Bibles. When we give money to the church, we are funding repairs, new programs, or things that are necessary for the building's continued operation. Without people giving an offering toward the local church budget, my church wouldn't be able to keep its doors open. Also, the church supports a local Adventist school, so we also need to give money to keep that school running.

On special occasions, like communion, we often take up an offering that goes to the poor in our community. The causes vary, like I said, but the focus of taking up an offering is doing something good for someone else.

The money you put in the offering place will go to a cause that is usually defined in the bulletin, although if you put in loose change (money that isn't put in the tithe envelopes provided), they will probably tell you if that goes somewhere different.

Now, I only know what happens in my own church, other SDA churches might do things differently. But I hope this helps answer the question. When you give you will receive, that is god promise.