A pH booster is a type of chemical product that is used to increase the pH level of a solution or soil. The pH level is a measure of the acidity or alkalinity of a substance, with a pH of 7 being neutral, a pH lower than 7 being acidic, and a pH higher than 7 being alkaline.In gardening and agriculture, pH boosters are commonly used to adjust the pH level of soil to a level that is optimal for plant growth. Different plants have different preferences for soil pH levels, and if the pH level is too low or too high, it can affect the availability of nutrients and minerals in the soil that the plants need to grow.