What does the portfolio page in wordpress mean? What is this page for?

Pages are pages, and combinations are product details pages.

This is a concept that wordpress often encounters in foreign themes.

A page is a page that publishes information about us, contact us, company profile, etc. This is easy to understand.

Portfolio is a common detail page in foreign themes, which is specially used to make product detail pages, similar to post pages.

Similar pages include WordPress articles, posts, pages, combined product pages, list pages, categories, pages, tabs, blog and other meanings and differences.

I wonder if you can understand this explanation.