Follow-up research involves conducting further investigations or studies related to a previous research project or study. This can include expanding on the findings of the initial research, exploring additional variables or factors, conducting longitudinal studies to track changes over time, or addressing any limitations or gaps in the original study. Follow-up research aims to build on existing knowledge and contribute new insights or advancements to a particular field of study. It provides a more comprehensive understanding of the topic and helps to validate or refine the initial findings.