Alright, kiddo, this is a bit of a tricky one, but I'll do my best to explain it in a way that's easy to understand.
So, Iran and Saudi Arabia are two countries who don't really get along very well. They both have different ideas about how the world should work, and they both want to be powerful and respected in their region of the world.
However, because they don't want to fight each other directly (it would be too dangerous and destructive), they end up fighting through other people. Think of it like two kids who don't want to get into a fistfight, so they get their friends to fight each other instead.
This is what we call a "proxy conflict" - it's a conflict between two countries that's fought by other people (like rebels, militias, or other countries). Iran and Saudi Arabia both want to have influence in other countries, so they often support different groups or governments in those countries.
For example, there's a war going on in Syria right now, and Iran and Saudi Arabia are both involved. Iran supports the government of Syria, while Saudi Arabia supports rebels who want to overthrow the government. This has led to a lot of violence and fighting between different groups.
Another example is in Yemen, where there's a civil war going on. Saudi Arabia supports the Yemeni government, while Iran supports rebels who are fighting against the government. This has also led to a lot of fighting and violence.
So basically, Iran and Saudi Arabia don't like each other very much, and they're constantly fighting through other people in other countries. It's like a big game of "capture the flag," but instead of flags, they're trying to capture power and influence.