A clear, focused explainer (via Medium) on how pixel density actually works and why it matters when you're designing and exporting assets.
Finally understanding @1x/@2x/@3x and why an asset looks crisp on one screen and blurry on another.
Designers who've copied density conventions without fully understanding them.
Free, roughly a 5-10 minute read.
A clear explainer on how pixel density works and why it matters for your designs.