Random act of kindness

What is the meaning of ‘Random act of kindness?’
”Act of kindness’. To perform an act of contribution, help, kindness or share with someone if you know they need it. Some people have a personal goal to perform an act of kindness every day to one person as they feel grateful for what they have and love to help others if its needed.

Hold the door open
Give an honest compliment
Thank someone who you appreciate
Be a good listener
Offer your help to someone
Ask the person who’s serving you how their day is going
Treat someone to a coffee or tea (with the help of an adult)
Let someone go past you in the grocery queue
Send a kind note to a friend out of the blue