Quantitative Data Research: (Examples of this include surveys and questionnaires) used to be able to measure and predict a result in order to perform a final conclusion.
Qualitative Data Research: (Examples include Diary account) Qualitative date is all about answering questions with more personal opinions involved.
There is two different types of data that is typically collected from these two research strategies, these are:

Secondary Research: Data that has been recorded by others but has been transferred into relativity in your questionnaire an example of this is finding out that a survey in magazine said that 50% of people like a certain weather type over another weather type and recording that statistic and keeping it within your results
But why is this necessary, and how can it benefit a music magazine?
The data that will be recorded is necessary as it means that media consumers will get the most out of a piece of media based on their own opinions. People in media may not like something but don't like complaining so they just carry on either suffering or without, when a questionnaire is taken more peoples opinions are taken into account and certain things are done to help benefit a piece of media to an audience's preference such as conducting a study into "what colour people would be more likely to buy a magazine in?" If this question was answered truthfully by an audience then the media institution conducting the survey may see an increase in magazine sales, as they will have taken the audience's opinions into account.