A triplestore is like a super fancy type of database. It's mainly used to store information about relationships between things. So for example, if you were trying to figure out which people live in certain cities, you can use a triplestore to find the answer. A triplestore would tell you who lives in each city, and it would also tell you the things that they have in common, like their age, job, or hobbies. You can think of a triplestore like a special map that shows connections between people and things.