Why are we asked to walk 10,000 steps every day to stay fit? Know the reason behind it

In the kind of life we ​​are living these days, it is very important to take time for fitness. Amidst the responsibilities of home and office, you must take out 1 hour of the day for yourself. Be it morning or evening, you can take time for your fitness and exercise anytime. It is said that to stay healthy, you must walk 10 thousand steps a day. Walking is the easiest way to stay fit. It has been revealed in many reports that walking 10 thousand steps a day is beneficial. By walking 10 thousand steps, you cover about 7.6 kilometres. Now the question arises why are we asked to walk only 10 thousand steps and what are the benefits of it?