Quantitative market research is great as it gets you a direct answer to a specific question you may have.The most obvious types of quantitative research are surveys and polls.
In-person surveys are great as they provide immediate results. Whilst a lot of companies outsource phone surveys to companies. The marketing firm will randomly select numbers to call, but it is seen as an effective method as statistics are easily collected.
In the digital age, online surveys are everywhere. As pop-ups and there are also sites which pay people to take surveys. Again this is great as you get instant feedback.
The type of market research you do, depends on your budget, target audience and time constraint.