Is the market a place? Or a thing? Neither, really. It's a concept. If you are growing tomatoes in your backyard for sale, you are producing for the market. You might sell some to your neighbor and some in your little stand by the roadside and some to the manager of the local supermarket. But in either case, you are producing for the market. Your efforts are being directed by the market. If people stop buying tomatoes, you will stop producing them. If you mow lawns to earn money, you are producing a service for the market. If your father a steelworker or a bricklayer or a truck driver or a dentist or a grocer, he is producing goods or services for the market.
When you spend your income, you are buying things from the market. You may spend money in stores, supermarkets, gas stations, and restaurants. Still you are buying from the market. When the local grocer hires you to drive the delivery truck, he is buying your labor in the labor market.
The market may seem to be a fuzzy sort of thing. But for each person (or business) who is making and selling something, it's very real. If nobody buys your tomatoes, it won't be long before you get the message. The market is telling you something. It's telling you that you are using your energies and resources in doing something the market doesn't want you to do.