Stress is part of life, and meditation will not change that. But it can influence how strongly you experience stress and how you respond to it.
Mindfulness-based meditations train you to notice thoughts, feelings, and physical sensations before reacting to them immediately. Studies show that approaches like these can reduce subjective stress. There is also evidence of changes in physical stress markers such as cortisol, although the findings are not consistent across all studies.12
Even a single meditation can reduce perceived stress in the short term. For more lasting effects, studies usually involve regular practice over longer periods.3
Meditation will not make your life stress-free. But it may help you meet stress a little differently.