What is meant by 'saturation' in qualitative research?

Saturation in qualitative research refers to the point at which data collection can cease because no new themes or insights are emerging from the information being gathered. This indicates that the research has reached a comprehensive understanding of the phenomena being studied. When researchers observe that additional data collection does not yield new information or perspectives, they conclude that saturation has been achieved. This concept underscores the effectiveness and thoroughness of the research process, ensuring that the analysis is robust and reflective of the participants' experiences and views. As researchers aim for saturation, they can increase confidence that they have captured the essential dimensions of the topic under investigation.