How to check page speed with Google PageSpeed Insights.

當 PageSpeed Insights 偵測到網頁上的圖片可供最佳化調整，以縮減檔案大小，且不會大幅影響視覺品質，就會觸發這個規則。

Google PageSpeed score is an important factor determining your website's SEO ranking, and images have a substantial impact on it. Know how to optimize your images to improve your Google PageSpeed Insights score with image optimization.

Wondering how to optimize images for page speed and Google? Read the article and learn the best image optimization techniques you need to implement right away.

For details, see the Google Developers Site Policies.

【Google-pagespeed】如何預先載入最大內容繪製圖片 專案顧問 Vince Wu

PageSpeed Modules can optimize most common image formats, including GIF, PNG, and JPEG, and convert them to PNG, JPEG, or WebP. GIF, PNG, and JPEG are supported by all browsers.

PageSpeedInsights教學介紹如何使用這個Google開發的線上應用，貼上網址它會立刻檢查網站速度的問題，是提升SEO必學技能，在此提供一系列文章，帶你熟悉掌握這項工具。