Planet

A planet is a celestial body that orbits a Star, and is pulled through the Universal law in gravity, to maintain an orbit. Planets come from different, and there are still planets waiting to be discovered! 
Difference of Dwarf Planets and normal planets 
The difference between dwarfs(Candidates) are that they are smaller. If you are wondering, idk, but you can ask the IAU, they demoted Pluto a dwarf planet, but I know that a planet needs a clear orbit for its path, and it needs to be BIG. Like the ones with gravity like big bois.