This review discusses the role of abscisic acid (ABA) in plant responses to abiotic stresses, focusing on its molecular mechanisms and signaling pathways. ABA is a key phytohormone that regulates various physiological processes and provides plants with stress tolerance to environmental challenges such as drought, salt, and cold. The review highlights how ABA levels increase under stress conditions, leading to the activation of stress responses. Key aspects covered include seed dormancy and germination, root architecture modulation, leaf senescence, stomatal regulation, and overall abiotic stress response. The role of ABA in gene expression and the involvement of specific proteins and kinases in ABA signaling are also discussed. The review emphasizes the importance of understanding ABA's regulatory mechanisms to develop crops with enhanced stress tolerance, which is crucial for meeting the increasing demand for agricultural production to feed a growing global population.This review discusses the role of abscisic acid (ABA) in plant responses to abiotic stresses, focusing on its molecular mechanisms and signaling pathways. ABA is a key phytohormone that regulates various physiological processes and provides plants with stress tolerance to environmental challenges such as drought, salt, and cold. The review highlights how ABA levels increase under stress conditions, leading to the activation of stress responses. Key aspects covered include seed dormancy and germination, root architecture modulation, leaf senescence, stomatal regulation, and overall abiotic stress response. The role of ABA in gene expression and the involvement of specific proteins and kinases in ABA signaling are also discussed. The review emphasizes the importance of understanding ABA's regulatory mechanisms to develop crops with enhanced stress tolerance, which is crucial for meeting the increasing demand for agricultural production to feed a growing global population.