"Reach" refers to the extent or distance that something can extend or cover. In various contexts, it can describe physical distance, such as how far a person can stretch their arm, or it can refer to the audience size in media and marketing. For example, in social media, the reach of a post indicates how many people have seen it. In business, "reach" is often used to measure the effectiveness of advertising campaigns. A higher reach means that more potential customers are exposed to a brand or product. This is crucial for companies looking to increase their visibility and engagement with their target audience, such as businesses using social media platforms.