What is the difference between a metaphor and a smiley?

Difference between simile and metaphor

Simile uses the word "like" or "as"

Metaphor doesn't

While both similes and metaphors are used to make comparisons, the difference between similes and metaphors comes down to a word. Similes use the words like or as to compare things-"Life is like a box of chocolates." In contrast, metaphors directly state a comparison-"Love is a battlefield."