Low-Quality Image Placeholder Technique to Optimize Largest Contentful Paint

Largest Contentful Paint [1], one of the main metric to measure perceived load speed, tends to penalize low-quality image placeholder. This article digs into how, what can be done to remain on the right side of LCP when your LCP is an image, and why you don't want to just upscale.

[1] https://web.dev/lcp/