A hero stone is like a special rock that people in India and some other countries use to remember important people who did brave things a long time ago. The hero stone has pictures carved into it that tell a story about the brave person and what they did. It might show them fighting a bad guy or saving someone who was in danger.
People put hero stones in special places, like near the person's house or where they did their brave deed, so that everyone can see and remember what they did. It's like a monument or a statue, but instead of being made of metal or concrete, it's made of rock.
Hero stones are important because they remind us of the people who helped make our world a better place. They show us that even if we're just one person, we can do amazing things if we're brave and do what's right.