Here's why:
* Rovers are designed to traverse the surface of a celestial body, typically using wheels. They're equipped with scientific instruments to collect data and explore the environment.
* Probes is a more general term that can refer to any spacecraft sent to explore space.
While some rovers are also probes, the term "rover" specifically indicates a vehicle that can move around on a planet or other celestial body.
Some examples of famous rovers:
* Sojourner (Mars Pathfinder mission)
* Spirit and Opportunity (Mars Exploration Rovers mission)
* Curiosity (Mars Science Laboratory mission)
* Perseverance (Mars 2020 mission)