International rankings are like a competition where countries around the world compare themselves in different areas like economy, education, healthcare, etc. When we talk about Iran's international rankings, we are finding out how well Iran is doing compared to other countries in the world in different areas.
For example, if we talk about Iran's economy, we want to know how rich or poor Iran is compared to other countries in the world. There are different organizations that make these rankings and they use different criteria to measure the performance of a country.
For a five-year-old, let’s imagine you’re in a sports competition, like running or jumping. You would want to measure how well you did compared to other kids, right? That’s what international rankings are for countries – it’s about checking how well they’re doing compared to other countries in different areas.