Desk research is best described as:

Desk research refers to the process of utilizing existing information that has already been collected and published by other sources. This method involves analyzing data from reports, academic papers, market research studies, online databases, statistics, and other secondary sources. By leveraging information that is already available, businesses can save time and resources while still gaining valuable insights into the market, consumer behavior, and industry trends.

In contrast, collecting new data from consumers involves primary research, which is different as it requires direct interaction with the target audience. Conducting experiments in a lab signifies a controlled environment research approach, often focused on specific variables, rather than analyzing existing information. Implementing marketing strategies relates to practical application rather than the research phase. Thus, desk research is best described by using existing information gathered by others.