Single cell epigenetics is a research field and methodological approach dedicated to investigating epigenetic modifications at the resolution of individual cells. It examines the molecular mechanisms that regulate gene expression and are heritable through cell division but do not alter the primary DNA sequence, specifically within single cellular units. This approach utilizes high-throughput technologies to profile epigenetic marks such as DNA methylation, histone modifications, and chromatin accessibility in isolated single cells, thereby revealing cellular heterogeneity and the dynamics of regulatory landscapes. Its significance lies in providing high-resolution insights into cell state transitions, developmental processes, and disease pathogenesis that are obscured in bulk analyses.