What Becomes of a Free Electron?

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Electrons in the first energy level require energy absorption from photons to transition to the second energy level. If the energy is sufficient, electrons can escape their atoms and become free. The behavior of these free electrons depends on the surrounding context, such as the photoelectric effect, which describes how light can cause electrons to be emitted from materials. Once freed, electrons can move away from their original atom, but their specific actions and interactions will vary based on environmental factors and the energy involved.
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Electrons in the first energy level needs energy to go to the second energy level by absorbing photons and the electron can escape from its atom if the energy was high enough and be free. Now what's going to happen to this free electron after it escaped from its atom?
 
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It was helpful, but I still don't understand. What does a free electron do?
 
Flies away.
 

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