What is Image Optimisation?
Reducing image file sizes and choosing the right format to make web pages load faster.
Why It Matters
Images are often the largest files on a page, so optimising them can significantly improve load times.
Real-World Example
Converting a 2MB PNG hero image to a 200KB WebP format with no visible quality loss.
“Understanding terms like Image Optimisation matters because it helps you have better conversations with developers and make smarter decisions about your software. You do not need to be technical. You just need to know enough to ask the right questions.”
Related Terms
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Related Terms
Lazy Loading
Delaying the loading of content or code until it is actually needed.
Web Vitals
A set of metrics from Google that measure real-world user experience on web pages.
LCP (Largest Contentful Paint)
A metric measuring how long it takes for the largest visible content element to finish loading.
Cache
A temporary storage that keeps copies of frequently accessed data for faster retrieval
CDN
A network of servers around the world that stores copies of your content closer to users
Throttling
Slowing down requests instead of blocking them entirely when limits are approached