Primary research has it's advantages and disadvantages.
Advantages:
- The researcher can focus on qualitative and quantitative issues.
- The researcher can control the search design to fit their needs, so they can address specific research issues.
- Primary research allows the marketer to focus on specific subjects and enables the researcher to have a higher control over how information in collects. The researcher can also decide the size of the project, time frame and goal.
- Primary research can be expensive in preparing and carrying out the research compared to secondary research. The cost can be for paper for questionnaires or the equipment for an experiment.
- For it to be done properly primary data collection requires the development and execution of research plan. It does take longer to produce primary research than to find secondary data.
- By the time primary data has been collected the research may be out of date.
This is an example of a survey, one of the ways a researcher collects their data.

Different methods to collect data have their advantages and disadvantages also. Surveys are great for if you're targeting a specific audience and wanting quick and simple answers.
A few disadvantages are that customized surveys could contain certain errors or the respondents could not give honest answers.