Proteomics is the study of the structure, function, and interactions of proteins. The proteome is the entire set of proteins expressed by a genome or cell. Proteomics uses various methods to study protein structure and function, qualitative and quantitative analysis of proteins, and protein-protein interactions, which can be stable or transient. Understanding protein interactions is important for studying biological processes and diseases. Proteomics has advantages like identifying biomarkers and drug targets. However, studying proteins is complex due to varying protein concentrations in organisms and cells.