To charge an item means to apply its energy toward a specific purpose. For example, you would charge a talisman for protection. Some use the word “program” to describe this process.
Charging an Item
It is generally believed that an item should be cleansed before it is charged.
The process of actively charging an item generally involves raising energy with a specific purpose in mind and directing that energy into the item while declaring your intention out loud. This is often done within the context of a larger ritual, or not, depending on tradition and individual preference and experience.
Items may be passively charged by placing them in the moonlight or sunlight. This method is popular for minerals and crystals and is used to make moon water.