Research collected first-hand; it is specific to the needs of the business, more up to date and reliable, better for two-way communication and follow-up questions, often better if you want to collect qualitative data. Sampling provides an insight into the market, but saves money as the whole population is not needed; a sample must be representative, unbiased and large enough to represent the whole market. Examples include questionnaires, consumer panels, interviews, focus groups and customer observations