What does h factor mean?

The "h factor," or h-index, is a metric used to measure the productivity and citation impact of a researcher's publications. It reflects the number of papers (h) that have been cited at least h times each. For example, an h-index of 10 means the researcher has 10 papers, each cited at least 10 times. This measure is often used to evaluate the influence and significance of a scholar's work within their field.