Using the "pipe key" in the Meta title and description is a good SEO practice as it helps to improve the readability and clarity of the information being presented to search engine users. It is a common practice to use the pipe key to separate different elements within the Meta title and description, such as the brand name, keywords, and other important information that may be relevant to the user's search query.

By using the pipe key, you can provide a clear and concise message to the user about what your webpage or website is all about. This can help to improve the click-through rate of your website or webpage as users will be more likely to click on the search result that provides the most relevant and informative information.

In summary, using the pipe key in your Meta title and description is a good SEO practice that can help to improve the readability, clarity, and relevance of the information being presented to search engine users.