"marketers use online marketing to reach new business customers, serve current business customers more effectively, and obtain buying efficiencies and better prices."

The correct word for the blank space is: Business.

Explanation:

Information Technology is part of nowadays business. It is a tool that lowers barriers for buyers and sellers from different regions to meet. From the sellers' end, it allows them to know more about customers, what their needs are, and also to have an overall idea of what their competitors might be doing to improve their marketing processes and boost sales.

it should be