There are literally thousands of different producers of goods and services and millions of different consumers of these goods and services in the economy. In macroeconomics, all these different markets for goods and services, which include both the producers and the consumers, are grouped together under the heading of the goods market. In economics, this grouping together is called aggregation.
It is in the goods market that households (consumers) buy their goods and services and the producers supply their goods and services. Two active participants in this market are households, as the demanders of goods and services, and firms, as the suppliers of goods and services.