Conditional probability is when you only care about a certain outcome, but not the others. Like when you're at the buffet, and you only care about the free breadsticks. You're not interested in the 3rd helping of mashed potatoes.
Let's say you flip two coins. The first one is heads, and the second one is tails. What's the probability the second coin is tails given the first one is heads?
Click here for a fun experiment! to try it out for yourself!
You might ask, "Why should I care about conditional probability?" Well, imagine you're on a date, and you only care about the free dessert, but not the free dinner or the free drinks. That's conditional probability in action!