Metadata is information about a website that is used by search engines and other services to better understand and index the website. This data is embedded in the HTML code of the website and contains information such as the title of the page, descriptions, keywords, author, language and much more.

Using metadata can help a website to be found better in search engine results by giving search engines an overview of what the page is about and what type of content can be found on the page. The metadata can also help a website to be better understood when shared on social media by providing a summary and image of the page.

However, it is important to note that not all metadata is used by search engines and other services. Some metadata, such as keywords, have been misused in the past to manipulate search engine rankings, so that search engines such as Google no longer give this metadata as much weight. Metadata should therefore be used carefully and only for informative purposes.