What are the two valid statements with regard to the critical rendering path (CRP)?

The "Critical" tool on GitHub is indeed a popular open-source solution that helps developers extract and inline critical CSS, which is essential for optimizing the Critical Rendering Path (CRP). This process ensures that the above-the-fold content renders as quickly as possible. The concept of an "initial view" (above-the-fold content) and "below-the-fold content" is fundamental to CRP optimization, as the CRP focuses on rendering the visible portion of the webpage first. CRP on mobile is generally smaller, not bigger, than on a desktop because mobile devices often have smaller viewports, meaning less content is initially visible. Non-critical CSS is explicitly not required when the site starts to render; it can be loaded asynchronously or deferred to avoid blocking the CRP.