The pH scale measures how acidic or basic a substance is, and is important in many aspects of daily life.

• It helps us understand the chemical nature of substances we use or consume.
  
  
• It helps us determine if water is safe to drink or if soil is suitable for plant growth.
  
  
• It helps us understand how the pH of our bodies affects our health.
  
  
• It helps us understand how the pH of soil affects plant growth.