This question is a regular feature in Magento 2 frontend interview questions, be ready to tackle it.   The name of a layout file is represented by a layout handle. There are three different kinds of layout handles, as follows:  Page-type Layout Handle: This handle aids in determining the page type. For instance, the Magento application's product pages are identified using the catalog product view variable.  Page Layout Handle: This handle is used to identify particular pages. As an illustration, the product ID 128 of catalog product view type simple id is utilized to identify a specific product.  Arbitrary Handle: It is used by other handles even though it doesn't define a page type.