If you see a forerunner what does it mean?

A forerunner typically refers to something that precedes or indicates the approach of something else. In a broader context, it can signify an early sign or precursor of an event, trend, or development. For example, in a scientific or technological context, a forerunner might be an early model or version of a product that hints at future advancements. Overall, it suggests that change or progress is on the horizon.