How far should a 70 year old walk every day?

Could you please elaborate on the ideal daily walking distance for a 70-year-old individual? Are there any specific health benefits associated with a certain amount of daily walking for seniors? Also, what factors should be considered when determining an appropriate walking routine, such as fitness level, medical conditions, and personal preferences? Ultimately, what is the most important factor to keep in mind when setting a daily walking goal for a 70-year-old?