You can go by the definition that kindness just means being nice but I think it means something way more. I think that it means that you care about all the little things in someone's life and find anyway to brighten up their day.
Something humanity is having trouble remembering, but something that we all strive for, like that really good meal you ate at the golden corral that you can't remember the next day.
Take a shit in a grocery bag, put a little sugar on it, and put it into an unsuspecting individuals mail box with a sign saying: rich in flavour and ring the individuals front door doorbell. This is an act of kindness by giving away homemade chocolate (very homemade)
Timmy: i wonder if people on the internet may give me kindness and support for my suisidal thoughts?
Redditard: Lol #looking4attenrionalert die shit, die
Timmy: *kills himself*