The Bible teaches that God exercises divine providence over all of creation and all the events of human history (Isaiah 46:9-10). One of the effects of His sovereign control is that He chooses some of us to be blessed with financial wealth. Today's verse is a reminder that the reason you've been given your wealth is to be "generous in every way".
When I say wealth, I'm not talking about people who drive the fanciest cars and live in the most exclusive neighborhoods. If you have enough to feed yourself, clothe yourself, and put a roof over your head, whatever remains is a gift for you to use to be generous. You could be generous towards those who don't have food/clothing/roof, or you could be generous towards the work of the ministry, giving to your church or missionaries overseas.
Imagine the personal pride you could feel at choosing to live below your means, just for the opportunity to bless others. What if you didn't always have the newest phone, expensive clothes and jewelry, or a new car in the garage? What if you you modeled this to your kids, and then instead of buying them everything they ask for, teach them the values both of hard work and generosity?
While the Bible doesn't establish a formula to gain wealth through giving, it does teach us that "God loves a cheerful giver" (2 Cor 9:7), that "it goes well for a person who is gracious and lends" (Ps 112:5), and "One who is gracious to a poor person lends to the Lord, And He will repay him for his good deed." (Proverbs 19:17). This isn't a path to wealth, since the Bible teaches that "if we have food and clothing, with these we shall be content." (1 Tim 6:8). But God loves it when we find joy in generosity, and He loves to increase our joy by giving us more to give away.