pH testing measures the acidity or alkalinity of a solution on a scale from 0 to 14. A pH of 7 is neutral, values below 7 indicate acidity, and values above 7 indicate alkalinity. This testing is essential in various fields, including agriculture, environmental science, and medicine, as it helps determine the suitability of soil, water, and bodily fluids. To perform a pH test, one can use pH strips, liquid indicators, or electronic pH meters. Each method provides a quick and accurate way to assess pH levels. Understanding pH is crucial for maintaining healthy ecosystems and ensuring proper chemical reactions in various applications.