Phosphoproteinomics refers to the study of identifying and characterizing proteins that are phosphorylated. There are several synonyms for this term, including phosphoproteomics, phospho-proteomics, and phosphor-proteomics. These terms are used interchangeably in the scientific community to describe the field of research that is focused on analyzing proteins that undergo phosphorylation. The identification of phosphorylated proteins and their respective phosphorylation sites is crucial for understanding the mechanisms of cellular signaling pathways, gene expression, and protein function. Advances in phosphoproteinomics have led to new insights into disease pathology, drug discovery, and personalized medicine.