A meta description is a brief summary of a webpage's content, typically around 150-160 characters long. It appears in search engine results below the page title and URL, helping users decide whether to click on the link. A well-crafted meta description can improve a webpage's visibility and click-through rate, making it an essential part of SEO (Search Engine Optimization). When writing a meta description, it's important to include relevant keywords related to the page's content. This not only helps search engines understand the topic but also attracts users' attention. Including a call to action, like "Learn more" or "Discover now," can encourage clicks, making your meta description a powerful tool in digital marketing.