What should always be included in the metadata of a webpage?

Including a title, keywords, and descriptions in the metadata of a webpage is vital for several key reasons. The title tag is essential as it provides a concise description of the page's content and is critical for search engine optimization (SEO). It appears in search engine results and can significantly influence whether users decide to click through to the webpage.

Keywords, although less prominently considered in recent SEO practices, still serve as a reference point for search engines about what the page content entails, helping to improve search visibility if used appropriately. Descriptions, typically found in the meta description tag, act as a summary of the page's content. This is also shown in search results, providing potential visitors with insight into what they can expect, which can improve click-through rates.

In contrast, including just a URL and an image does not provide comprehensive information to both users and search engines about the page's purpose and content. Limiting the metadata to only the page title or a brief summary would omit important details that contribute to both SEO performance and user experience. Overall, having a well-rounded set of metadata elements enhances discoverability and relevance in search engine results, making the selected answer the most comprehensive and effective choice.