Primary - Questionaires, Vox pops, talking to people, asking specialised people, phone conversations and Observation. As long as you personally go and research yourself it makes it primary research.
Secondary - Reading articles, Using other statistics, Online, Book, Other researcher’s work, Watching documentaries and listening to radio/podcast.
Qualitative - The quality in products and opinions on something
Quantitative - More towards statistics, numbers and facts.
Objectivity - Not biased, Fair researching, clear questions and being open.
Primary research is good as your personally doing it but it’s not as accurate if your not doing it on a larger scale.
Secondary research is great for big statistics as it’s more accurate as more data is collected but a downside to secondary research is whether it’s 100% reliable.
Doing both is even better as you can make comparisons with your personal data and someone elses data and make clearer conclusions with both information.