Meaning: Being kind to others can create a ripple effect of happiness and positivity, so make an effort to be kind whenever you can.
Choice of Words: "Kindness" is the quality of being friendly, generous, and considerate. "Spreads" means to cause something to become known or seen by many people. "Happiness" refers to a state of well-being and contentment. "Try it" means to make an attempt or effort to do something.