Answer:
Similes: using one thing to describe another. for example, "life can be described as a box of chocolates", meaning, "sometimes having unexpected surprises or nasty flavors (Like coconut or something) but still overall sweet!"
Metaphors: These are sayings that aren't meant to be taken seriously. For example, "I have a heart of gold". If my heart was actually made of gold, I would be dead. It's a metaphor meaning "my heart is as pure as gold".
Personification: This is when you give something a characteristic of a human. For example, "The lightning danced across the sky". We know lightning doesn't actually dance, but by saying the word "danced" we get an idea of the way the lightning moved.
(Random funny side note: Grammarly thinks my tone is "sad and uncertain" haha)
Hope this helps!