Salinity stress is a major environmental constraint affecting plant and crop productivity. It is caused by both natural and human-induced factors, with over 6% of the world's land affected. Salinity stress negatively impacts plant growth, biomass production, and yield of staple crops. The effects of salinity on plants include osmotic stress, ion toxicity, and disruption of ion homeostasis. Salinity stress affects various plant processes such as germination, growth, photosynthesis, water relations, nutrient imbalance, and yield. Salinity stress is a major limiting factor for crop growth and production. The review discusses the impact of salinity on plant metabolism and tolerance strategies in plants. The review also covers the types and causes of salinity, including natural and human-induced salinity. Secondary salinization is caused by human activities that alter the hydrological balance of the soil. Irrigation water with high salt content can lead to salt accumulation in the root zone, which can cause waterlogging and reduce crop productivity. The review highlights the importance of understanding salinity stress and developing strategies to enhance crop productivity under salinity stress. The review also discusses the role of genomics, metabolomics, proteomics, and transcriptomics in understanding salinity stress and developing salt-tolerant crops. The review concludes that further research is needed to develop strategies for improving plant productivity under salinity stress.Salinity stress is a major environmental constraint affecting plant and crop productivity. It is caused by both natural and human-induced factors, with over 6% of the world's land affected. Salinity stress negatively impacts plant growth, biomass production, and yield of staple crops. The effects of salinity on plants include osmotic stress, ion toxicity, and disruption of ion homeostasis. Salinity stress affects various plant processes such as germination, growth, photosynthesis, water relations, nutrient imbalance, and yield. Salinity stress is a major limiting factor for crop growth and production. The review discusses the impact of salinity on plant metabolism and tolerance strategies in plants. The review also covers the types and causes of salinity, including natural and human-induced salinity. Secondary salinization is caused by human activities that alter the hydrological balance of the soil. Irrigation water with high salt content can lead to salt accumulation in the root zone, which can cause waterlogging and reduce crop productivity. The review highlights the importance of understanding salinity stress and developing strategies to enhance crop productivity under salinity stress. The review also discusses the role of genomics, metabolomics, proteomics, and transcriptomics in understanding salinity stress and developing salt-tolerant crops. The review concludes that further research is needed to develop strategies for improving plant productivity under salinity stress.