What is the difference between useQuery and useLazyQuery in Apollo graphQL?

When useQuery is called by the component, it triggers the query subsequently.

But when useLazyQuery is called, it does not trigger the query subsequently, and instead return a function that can be used to trigger the query manually.
It is explained on this page:
https://www.apollographql.com/docs/react/data/queries/#manual-execution-with-uselazyquery

When React mounts and renders a component that calls the useQuery
hook, Apollo Client automatically executes the specified query.
But what if you want to execute a query in response to a different event, such as a user clicking a button?
The useLazyQuery hook is perfect for executing queries in response to events other than component rendering.
This hook acts just like useQuery, with one key exception: when useLazyQuery is called, it does not immediately execute its associated
query.
Instead, it returns a function in its result tuple that you can call whenever you’re ready to execute the query.