Non-probability sampling is a method used in research where not all individuals in a population have a chance of being selected. This approach often relies on the researcher's judgment or convenience rather than random selection. Common techniques include convenience sampling, where participants are chosen based on their easy availability, and purposive sampling, where specific characteristics are targeted. While non-probability sampling can be quicker and less costly, it may introduce bias, making it harder to generalize findings to the entire population. Researchers often use this method when exploring new areas or when random sampling is impractical.