This document discusses different types of sampling techniques used in data collection. It describes probability sampling methods like simple random sampling, stratified random sampling, cluster sampling, and systematic sampling. It also outlines non-probability sampling techniques such as convenience sampling, snowball sampling, judgemental sampling, and quota sampling. Examples are provided to illustrate how to identify the sampling method used in various scenarios involving selecting groups of students, inspecting food items, surveying constituencies, and more. The key information provided relates to common sampling techniques and how to determine which one is being employed in different research situations.