ConstFirstInputDelay measures the time from when a user first interacts with the page to the time when the browser is able to respond to that interaction.
InteractionToNextPaint measures the time from when a user interacts with the page until a visual representation of a page reaction was rendered.
LargestContentfulPaint - Render time of the largest image or text block visible within the viewport, recorded from when the page first begins to load.
Long Animation Frame (LoAF) measures frames that take more than 50ms to render, blocking the main thread.
LongTask measures the time from when a user interacts with the page until a visual representation of a page reaction was rendered.
LayoutShift - CumulativeLayoutShift measures to which extent users encounter unexpected layout shifts.