Empathy has many sayings like putting yourself in their shoes, feeling for others and caring for one and other. Empathy is similar to sympathy but only in some cases. The difference between those two is empathy is when you understand where their feelings come from but it doesn't necessarily mean you have to agree with them.
Personally I think empathy is important because without it, the world would be full with hate and not enough happiness. Empathy helps us to see in to other peoples perspective and views with out that the world will be with two much fights. That's what I think empathy is what do you think it is?