What is the difference between Freckles and Moles?

Nice question, I like freckles. They are usually temporay and appear most of the times during the summer. They are caused by the exposure to the Sun. Usually the people with very pale skin have more of them, it's a king of "protection" the skin elaborates against the Sun.

Moles instead are a concentration of melanine in a spot, they won't disappear as freckles do and usually they are already formed at the moment of birth.