Performance, sustainability & SEO guides

The Importance of robots.txt and llms.txt for AI & Agent Crawlability

Lighthouse alternatives for real-world performance

Lighthouse is a useful starting point. But if you’re relying on it to understand how your site actually performs for real users, it falls short.

What is Cumulative Layout Shift (CLS)

Cumulative Layout Shift (CLS) is a measure of how much your webpage's content unexpectedly moves around as it loads. Imagine you're about to tap a button, but just as your finger touches the screen, an ad loads above it, pushing the button down and causing you to tap the ad instead.

What is First Contentful Paint

Ever clicked on a link and stared at a blank white screen, wondering if the page is broken? That initial wait is what First Contentful Paint is all about.

What is First Input Delay

Have you ever tried to click a button or open an accordion menu on a webpage, but nothing happened for a frustrating second? That lag between your action and the site's reaction is what First Input Delay is all about.

What is Largest Contentful Paint

You've clicked on a webpage. The header and some text load, but you're still waiting for that main banner image or the headline to appear before the page feels truly "loaded." That moment when the most important piece of content finally shows up is what Largest Contentful Paint is all about.

What is Time to First Byte