Macrophages are one of the important cell types of the immune system, demonstrating significant adaptability that enables them to transform to different phenotypes in response to their surrounding environment. This review examines the characteristics of different macrophages phenotypes that can produce both pro-inflammatory and anti-inflammatory cytokines. The M1 phenotype, known for its inflammatory features, plays a pivotal role in fighting infections and tumors; however, it may also lead to tissue injury and persistent inflammation and play a role in autoimmune and inflammatory diseases. In contrast, the M2 phenotype is linked to anti-inflammatory activities and the processes of tissue repair. Recent progress in the characterization of unique macrophage phenotypes has opened up novel therapeutic approaches for the treatment of chronic inflammatory conditions, autoimmune disorders, and cancer diseases. This review highlights the critical role of macrophage polarization, illustrating how different stimuli can change macrophages fate and change their responses. Additionally, it explores the consequences of macrophage plasticity on the advancement of diseases and the effectiveness of treatments. This article seeks to clarify the processes involved in macrophage polarization and the resulting functional implications, with the goal of offering insights into therapeutic approaches that leverage the adaptability of macrophages to improve immune responses or alleviate disease states. Furthermore, it introduces all the phenotypes that discovered until to date. A comprehensive understanding of these dynamics cells is crucial for the advancement of targeted immunotherapies, which have the potential to develop treatment strategies for various medical conditions.