What is "protal"?

I'm sorry, but it seems there may be a typo in your question. The term "protal" does not appear to have a widely recognized definition or meaning in English. It is possible that you may have misspelled the word or are referring to a specific term or concept that is not commonly known.

If you could provide more context or clarify the term you are asking about, I would be happy to help provide a detailed explanation on the topic. Alternatively, if you meant to ask about a different term or concept, please let me know so I can assist you accordingly.