TTFB Time To First Bite
TTFB
TTFB Is a measure of response It should be under 200 milliseconds. In simple words, it is time for a query by the server to reach the browser. TTFB calculates the responsiveness of the server, and it is the first before any other loading performance statistics.
LCP
LCP Large Content Paintful is a large block of text and heavy images, and they definitely slow down the loading. It is the hero image or the largest content element that matters the most. For a good user experience, it should not be more than 1.2. As a matter of fact, all large images should be compressed and reduced in size, especially the hero image.
FCP
First Content Paintful or FCP is a user-centric metric. FCP is the first content that downloads when the browser renders the first element of the DOM. This restores users’ confidence that something is happening.
Performance This is a lighthouse performance score and it should be very high.
Structure This is a proprietary assessment of the lighthouse and custom GT Metrix. The higher the better.
TBT
Total Blocking Scripts site speed is hampered by unused Java and unused CSS scripts these should be removed as soon as possible. 150 mms or less is ideal for a good user experience.
CLS
Cumulative Layout Shift means how much layout shift is experienced by the user. All elements should be stable on-site and the cursor accuracy is of prime importance. For a good user experience, CLS should be 0.1. This means the user should not be running after an element with a cursor because those elements are not stable.
TTI
The time to interact should be less than 5 seconds.TTI measures how long it takes for a page to become interactive. Undue importance to content visibility often takes even when the site is not interactive. The site is considered fully interactive when the page displays useful content. The metrics are measured by FCP or first content paintful. This is when event handlers are registered for most of the elements on the page. An event is an action that takes place when the user interacts with the program.
Onload Time
When all elements of the page have finished downloading the onload time is complete. The resources include CSS, Java Scripts Images, etc. The ideal load time is from 0 to 2 seconds while time upto 3 seconds is also acceptable.
Fully Loaded Time
Fully loaded time is usually calculated after the end of onload and it is 2 seconds when there is no further network activity. This is the calculated time between the first to last server requests.
These are webcore vital metrics and all SEO service providers should follow them. Web core vitals and related technical solutions are imperative and they should not be overlooked.
First Input Delay
First Input Delay is the experience users feel when they first interact with the website. This is a core web vital metric and the user is frustrated when FID is high. Thus the low FID page responsiveness ensures that the page is usable. To provide a good user experience FID should be 100 milliseconds or less.
