Normal blood pressure for many adults is around 120/80, although individual targets may vary depending on age, health history, and guidance from a healthcare provider.
Blood pressure measures how strongly blood pushes against the walls of your arteries. The top number (systolic) measures pressure when the heart beats, and the bottom number (diastolic) measures pressure when the heart rests between beats.
Regular monitoring can help identify elevated blood pressure early, even when there are no noticeable symptoms.
Source
American Heart Association