General Data Protection Regulation is common in the Market Research industry. It gathers all the rules regarding data protection which has been a sensitive topics over the past few years. It must be followed throughly.
The survey is open for any type of respondent. No filter will be used. Every individual has equal chances of being selected for the study.
Also see: Booster
Gather a group of individuals for a group study. Group sampling is a manner of sample selection, where complete groups are naturally combined into research subjects.